High Quality - Comply with all relevant European standards; Shrinking ratio: 2:1 Easy Operation - Transparent sleeve provides precise inspection when strip and insert wires inside. More Effective Way - An easy connection of wires, insulated and sealed No Slip Wire Contact - Tubing reduces in size and solder will melt and flow through the stripped wires, strong holding --- your wire will never slip out of the connector. Can be Perfect used in marine and automobile applications A simple connection of wires, soldered, insulated and sealed can be ideal. Use in marine and automotive applications Polyolefin tubing to the outside and hot. Melt adhesive in interior solder and seal and with extended waterproof function. Polyolefin shrink-fit connector improved pull-out strength, provides. Gasket, strain relief, cable test and insulation. Material: copper tin plated Color: red, blue, white, yellow 23x Red Shrink connections. Diameter 2.7 mm, line -section 0.5-1.0 mm (A.W.G: 22-18). 12x blue shrink connections. Diameter 4.5 mm, cable section 1.5-2.5 mm (A.W.G: 16-14). 10x white shrink connections. Diameter 5.0 mm, cable -section 0.25-0.34 mm (A.W.G: 26-24). 5x yellow shrink connections. Diameter 1.5 mm, cable -section 4.0-6.0 mm (A.W.G: 12-10). Package Contents: 50 x shrink connector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.