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This ROCKWOOL foil-faced pipe insulation is made from mineral wool and covered in foil. With a 20mm thickness, 50mm wall, and 1m length, it fits pipes between 17mm and 114mm in diameter. Available in various bore sizes, the 22mm and 27mm bores come with 9 lengths per box. The 35mm bore has 8 lengths, while the 42mm and 48mm bores come with 6 lengths. The 54mm and 60mm bores are available in 5 lengths each, and the 60mm and 76mm bores come with 4 lengths. Finally, the 89mm, 108mm, and 114mm bores are provided in 1 length each. Ideal for a range of pipe dimensions, this insulation ensures durability and efficiency.. Rockwool Rocklap 50mm Wall x 1m Foil Faced Pipe Insulation - 114mm Mineral Wool PBR11450