... ) For flexible duct 4) Environmental 5) pipe heat shrink sleeve Brand name: dinghePlace of origin: zhejiang, China (mainland, Southeast coastal area)Appearance: straight, smooth ... the plastic layer and strip the plastic layer between the heat sealing area did not result in damageThe peel strength after ... /L,Hcl,480hclassgrade 7 High-quality Ventilation Hoses Film Pipe Heat Shrink Sleeve