Shieldmaster twin wall insulated pipe is made from an inner skin of 316 grade stainless steel and an outer skin of 304 grade stainless steel. It's temperature resistance is up to 450 degrees celcius and each piece has 30mm of compressed rockwool insulation in between the 2 skins. Shieldmaster is CE and Hetas approved and has a 12 year manufacturers warranty for piece of mind. Unlike other brands of twin wall, Shieldmaster can sit closer to any combustible materials, being only 50mm.
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