... , 19mm, 25mm, 32mm Standrad Lenght: 2M Certification: FM Rubber Foam Insulation Tube / Pipe features good heat protection, strong load bearing, non ... in China.Certification: FMData of TIT as follows: Thermal Insulation Pipe Inner Size(mm)Copper Pipe Size(Inch)Iron Pipe ... 89mm.About the Thermal Insulation Tube inner size ≥89mm, we suggest use the same thickness of the plate., Rubber Foam Insulation Tube