Features: Premium Heat Shrink Solder Sleeves (200 Piece set ) secure waterproof wire connection with built in adhesive that melts during diminishing , creating tight seals for superior insulation and electrical safety. Available in four sizes (0.25 6mm²), these nylon sleeves withstand extreme temperatures ( 55°C to 125°C) and shrink securely at 160°C+ for strong , shaking resistant electrical joints. Designed for electricians, automotive technicians, and enthusiasts needing stable , tool easy solution for splicing or repairing cables in tight spaces. Ideal for marine battery terminals, outdoor lighting systems, appliance wiring, and automotive harnesses where moisture resistance and long term durability are critical. Each set includes 200 sleeves with color coded sizes for quick identification, streamlining projects from home electronics repairs to industrial equipment maintenance. Specifications: Size: 28mm white tube, 40mm red/blue/yellow tube component : Nylon tube Working temperature: -55℃-125℃ Shrinkage temperature: >160℃ Weight: 153.7g/set Specifications: White 0.25-0.34mm²/40Pcs, Red 0.5-1mm²/80Pcs, Blue 1.5-2.5mm²/60Pcs, Yellow 4-6mm²/20Pcs Package Includes: 200Pcs Heat Shrink Solder Rings note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.