Heat shrink tubing kit 328 pieces various sizes and colors They can be used for solder joint protection, wire binding and labeling, color coding, headphone and furniture charging cable reinforcement, LED filament maintenance and much more. Features Shrink Ratio: 2: 1 (shrinks to 1/2 of the supplied diameter). Full shrinkage temperature: maximum 110 ° C. Operating temperature: -55 ° C to 125 ° C. Minimum shrinkage temperature: 70 ° C. Tensile strength: 10.4Mpa Internal diameter 1mm / 0.04in 2mm / 0.08in 3mm / 0.12in 4mm / 0.16in 6mm / 0.24in 8mm / 0.31in 10mm / 0.39in 14mm / 0.55in Kit quantity 120pcs x 1.0 x 40mm (yellow, black, red, green) 60pcs x 2.0 x 40mm (yellow, black, red, blue) 40pcs x 3.0 x 40mm (yellow, black, red, green) 32pcs x 4.0 x 40mm (yellow, black, red, blue) 24pcs x 6.0 x 40mm (yellow, black, red, green) 20pcs x 8.0 x 80mm (yellow, black, red, blue) 16pcs x 10.0 x 80mm (yellow, black, red, green) 16pcs x 14.0 x 80mm (yellow, black, red, blue)