... .Thermal insulating for air conditioner 2.Low thermal conductivity 3.Closed-cell flexible 4.Fire proof, Moistureproof 1.Thermal insulating for air conditioner2.Low thermal ... material : NBR/PVC ID size:1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8 ... /8", 1-5/8", 1-7/8", 2". Wall thickness: 1/4", 3/8", 1/2", 5/8", 3/4", 1", 1 ...