For easy installation purpose, the actual inner diameter(ID) is around 2mm larger than the size mentioned in the specification, for example, the actual inner diameter of 1-1/4 (32mm) ID foam tube is around 34mm. Normally, red represents hot water pipe while blue is used for cold water pipe. Water Air Conditioning Pipe Insulation PATIKIL 13mm (1/2") ID X 1.5cm X 1.5cm Pipe Insulation, Rubber Foam Winter Freeze Protection Pipe Fire Retardant For Water, Air Conditioner, Industrial Tube, Blue AC Line Insulation Instruction Easy to install, just cut to the size you need and insert your pipe into the foam tubing. Armaflex Pipe Insulation - Aircon Rubber Black Pipe Lagging Application: The foam insulation tubing can be used in various occasions, it can be used for insulating floor heating pipes, hot and cold water pipes, air conditioner copper line set, industrial pipes, hoses etc. Color: Red; Material: PPR foam; Size: 6., 6Ft Length, 2-3/8 (60mm) ID, 25mm Thickness; Package List: 1 x Pipe Insulation NOTE: Please check the size carefully before purchasing. Instruction: The Pipe Insulation Foam Tube is in good flexibility, easy and simple to install, just cut it into the desired length and insert the pipe to be insulated through the foam tube. NOTE Please choose the appropriate size before purchasing. PATIKIL 1 (25mm) ID x 5.9Ft x 0.27 Pipe Insulation, 2pcs In addition, it can be used as anti-collision material for handles, fitness equipment, utensils, product packaging etc. Rubber Insulation Foam for Copper Pipes 1/2 Thickness, 6feet Length... in addition, it can be used for protecting the handles of fitness equipment and utensils, and other DIY projects.