Description:      100% brand new and high quality      An easy one step connection of wires, soldered, insulated and sealed       Can be ideal use in marine and automobile applications       Polyolefin tubing in outside and hot melt adhesive in inside      Solder and seal and with advanced waterproof function      Polyolefin  heat shrink butt connectors improved pullout strength,       Provides seal, strain relief, cable check, and insulation      Specification:      Material: Tinned Copper      Colors: Red, Blue,White,Yellow      Size:            5pcs X Yellow Shrink Connectors:diameter 6.0 mm, cable cross-section 4.0-6.0 mm²         10pcs X White Shrink Connectors:diameter 1.5 mm, cable cross-section 0.25-0.34 mm²;            12pcs X Blue Shrink Connectors:diameter 5.0mm, cable cross-section 1.5-2.5 mm²;         23pcs X Red Shrink Connectors:diameter 3.0 mm, cable cross-section 0.5-1.0 mm²                           Package includes:     1 X 50PCS(Four Sizes)  Heat Shrink Connectors