Now Available BS336 Hose Coupling Range. Sizes 4"srt and 5"srt in full BS336 captive liner on female 4 lug nuts and in cast or polished finish produced in both aluminium alloy, and gunmetal. Drop Through pattern in sizes 2.5" 3" 4" 5"and 6" in materials aluminium, gunmetal, stainless steel,mild steel and polypropylene. We also manufacture adaptors 2.5" to 6" converting BS336 to Bsp and other threads to customers specification, in all of the above materials.Contact us now for current prices and availability.