... -flex adopting NBR/PVC as the main raw material, is an environmental product.It has closed cell structure ,which make ... standard products are balck,with sheet,tube two types. Usage :Bellsafe-flex (Class B1 )is widely used in heat preservation ... 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8", 1-5/8", 1-7/8", ... can beat any competitorPacking photo : NBR/PVC Insulation tube easy for installation