Our heat shrink tubing has the advantages of good electrical insulation, good tightness and corrosion resistance, high temperature resistance. Especially the heat activated adhesive lining provides impermeable seal to salt water and other liquids, which hase better performance when you and your kids DIY. Features - Color: Black and red. - Material: PE. - Size: 9.00 x 0.50 x 0.50cm/ 3.54 x 0.20 x 0.20 inch. - Best for electrical insulation, wire bundling, cable joints protection and wire repair. - Easy to use, if you don't have a heat tool, a hairdryer or a would also work. - The product with high ratio snug fit and electrical insulation. - Adhesive lining provides impermeable seal to water and other corrosive liquids. - polyethylene material is flame retartant and provides abrarion resistance. Package list: 90 x heat shrink tubings (1/16 45mm)(45black 45red) 90 x heat shrink tubings (3/32 45mm)(45black 45red) 80 x heat shrink tubings (1/8 45mm) (40black 40red) 20 x heat shrink tubings (3/16 90mm)(10black 10red) 12 x heat shrink tubings (1/4 90mm)(6black 6red) 8 x heat shrink tubings (3/8 90mm)(4black 4red)