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