These heat shrink tubes can be used with a hair dryer or similar. They can be used for insulation, protection, and reinforcement of resistors, capacitors, wire terminals, and wire connections. This is a set of 127 pieces. Individual sales are not available; it is sold as a set of 127. 【Product Description】 Shrinkage Ratio: 2:1 (shrinks to a maximum of 1/2 of the original diameter) Minimum Shrinkage Temperature: 70℃, Maximum Shrinkage Temperature: 110℃ Material: Polyolefin (non-toxic, flame-retardant, and flexible) Tensile Strength: 10.4MPa Operating Temperature: -55℃ to +125℃ Dielectric Strength: 15KV/mm Color: Black Versatile: An ideal set for electronic repairs, insulation work, and repairs by technicians and amateurs. 【Contents Details】 Sizes: 2 mm, 2.5 mm, 3.5 mm, 5 mm, 7.0 mm, 10.0 mm, and 13 mm, 7 types in total 2.0mm x 40mm → 30 pieces 2.5mm x 40mm → 25 pieces 3.5mm x 40mm → 20 pieces 5.0mm x 40mm → 20 pieces 7.0mm x 80mm → 16 pieces 10.0mm x 80mm → 8 pieces 13.0mm x 85mm → 8 pieces