{"product_id":"galvanised-concentric-spiral-duct-reducer","title":"Galvanised Concentric Spiral Duct Reducer (315mm – 630mm)","description":"\u003ch2\u003eGalvanised Concentric Reducer – Spiral Duct Reducer \/ Increaser\u003c\/h2\u003e\n\u003cp\u003eA galvanised steel concentric reducer for connecting round ducting of two different diameters – for example a 450mm fan to a 400mm duct run. The smooth tapered body keeps airflow even and limits pressure loss. Fit it either way round to reduce or increase the duct size.\u003c\/p\u003e\n\u003ch3\u003eSizes \u0026amp; Prices (including VAT)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e315mm to 250mm\u003c\/strong\u003e – £28\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e315mm to 300mm\u003c\/strong\u003e – £28\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e355mm to 300mm\u003c\/strong\u003e – £34\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e355mm to 315mm\u003c\/strong\u003e – £34\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400mm to 315mm\u003c\/strong\u003e – £34\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e400mm to 355mm\u003c\/strong\u003e – £34\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e450mm to 355mm\u003c\/strong\u003e – £39\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e450mm to 400mm\u003c\/strong\u003e – £39\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500mm to 400mm\u003c\/strong\u003e – £59\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500mm to 450mm\u003c\/strong\u003e – £59\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e560mm to 450mm\u003c\/strong\u003e – £75\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e560mm to 500mm\u003c\/strong\u003e – £75\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e630mm to 500mm\u003c\/strong\u003e – £73\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e630mm to 560mm\u003c\/strong\u003e – £73\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom size (any other combination)\u003c\/strong\u003e – £125\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCustom Sizes\u003c\/h3\u003e\n\u003cp\u003eNeed a combination that is not listed? Select \u003cstrong\u003eCustom size\u003c\/strong\u003e and write the two diameters you need in the order note at checkout, or contact us before ordering. Custom reducers are made to order (approx. 4 working days).\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Galvanised steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Concentric (centred) reducer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit:\u003c\/strong\u003e Spiral ducting and fittings of the matching diameters\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDelivery\u003c\/h3\u003e\n\u003cp\u003eSent by post across England and Wales for a flat £15 per order (small duct fittings), typically within 1–3 working days. Free collection from our Birmingham workshop is also available.\u003c\/p\u003e\n\u003ch3\u003eComplete Your Duct Run\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/spiral-pipe\"\u003eSpiral pipe\u003c\/a\u003e in matching diameters\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/90-degree-spiral-bent-elbow\"\u003e90-degree\u003c\/a\u003e and \u003ca href=\"\/products\/galvanised-45-degree-spiral-duct-elbow\"\u003e45-degree spiral bends\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/galvanised-round-equal-t-piece-duct-fitting\"\u003eRound T-pieces\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/galvanised-spiral-duct-male-coupler\"\u003eMale couplers\u003c\/a\u003e, \u003ca href=\"\/products\/galvanised-concentric-spiral-duct-reducer\"\u003ereducers\u003c\/a\u003e and \u003ca href=\"\/products\/galvanised-spiral-duct-end-cap\"\u003eend caps\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/galvanised-split-ring-duct-clamp\"\u003eSplit ring duct clamps\u003c\/a\u003e and \u003ca href=\"\/products\/galvanized-threaded-rod-threaded-bar-stud\"\u003ethreaded rod\u003c\/a\u003e for hanging\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Canopy Man","offers":[{"title":"315mm to 250mm","offer_id":61054245798222,"sku":"RED-315-250","price":28.0,"currency_code":"GBP","in_stock":true},{"title":"315mm to 300mm","offer_id":61054245830990,"sku":"RED-315-300","price":28.0,"currency_code":"GBP","in_stock":true},{"title":"355mm to 300mm","offer_id":61054245863758,"sku":"RED-355-300","price":34.0,"currency_code":"GBP","in_stock":true},{"title":"355mm to 315mm","offer_id":61054245896526,"sku":"RED-355-315","price":34.0,"currency_code":"GBP","in_stock":true},{"title":"400mm to 315mm","offer_id":61054245929294,"sku":"RED-400-315","price":34.0,"currency_code":"GBP","in_stock":true},{"title":"400mm to 355mm","offer_id":61054245962062,"sku":"RED-400-355","price":34.0,"currency_code":"GBP","in_stock":true},{"title":"450mm to 355mm","offer_id":61054245994830,"sku":"RED-450-355","price":39.0,"currency_code":"GBP","in_stock":true},{"title":"450mm to 400mm","offer_id":61054246027598,"sku":"RED-450-400","price":39.0,"currency_code":"GBP","in_stock":true},{"title":"500mm to 400mm","offer_id":61054246060366,"sku":"RED-500-400","price":59.0,"currency_code":"GBP","in_stock":true},{"title":"500mm to 450mm","offer_id":61054246093134,"sku":"RED-500-450","price":59.0,"currency_code":"GBP","in_stock":true},{"title":"560mm to 450mm","offer_id":61054246125902,"sku":"RED-560-450","price":75.0,"currency_code":"GBP","in_stock":true},{"title":"560mm to 500mm","offer_id":61054246158670,"sku":"RED-560-500","price":75.0,"currency_code":"GBP","in_stock":true},{"title":"630mm to 500mm","offer_id":61054246191438,"sku":"RED-630-500","price":73.0,"currency_code":"GBP","in_stock":true},{"title":"630mm to 560mm","offer_id":61054246224206,"sku":"RED-630-560","price":73.0,"currency_code":"GBP","in_stock":true},{"title":"Custom size","offer_id":61054246256974,"sku":"RED-CUSTOM","price":125.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1032\/9522\/2094\/files\/galvanised-concentric-spiral-duct-reducer.jpg?v=1791075778","url":"https:\/\/canopyman.uk\/products\/galvanised-concentric-spiral-duct-reducer","provider":"Canopy Man","version":"1.0","type":"link"}