Waterproof - Polyolefin tube on the outside and hot melt adhesive on the inside provide excellent waterproofing and are ideal for marine and automotive industries, home and electronic appliances. Minimum soldering temperature for melting: 138 °C Minimum shrinking temperature: 80 °C Operating temperature: -55 ℃ - 125 ℃ Package contents: White: 0.25-0.34 ² mm, 1.5 mm - 5pcs Red: 0.5-1.0 ² mm, 3.0 mm - 10pcs Blue: 1.4 -2.5 ² mm, 5.0 mm - 10pcs Yellow: 4.0-6.0 ² mm 6.0 mm - 5pcs Black thermos - 70pcs