[Large collection of electrical wires]: 5 colors (black, yellow, blue, green, red), 12 specifications, 750 pieces. [12 heat shrink tubes. length] : 45mm; diameter : 1mm / 1.5mm / 2mm / 2.5mm / 3mm / 3.5mm / 4mm / 5mm / 6mm / 7mm / 10mm / 13mm. [ [Shrink Rate Heat Shrink Fittings]: 2:1. Excellent flame retardant and insulating performance. Soft and flexible, low shrinkage temperature, rapid shrinkage, acid and alkali resistance, anti-aging. [Environmental protection material]: RoHS standard and Sony-SS-00259 standard. The composition of the material does not contain PBB, PBBO, PBBE, heavy metals and other environmentally hazardous substances. : Covers all wire gauges you will need in RC hobbies and many other applications. Mainly used in wire connection, rust prevention and corrosion protection of solder joints, protection and insulation treatment of wire end, wire harness and electronic components. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-GONGQ trading 3