Solder Seal: White x 25: 1.5mm diameter, 0.25-0.34mm² cable section (A.W.G: 26-24); Red x 35: 3.0mm diameter, 0.5-1.0mm² cable section (A.W.G: 22-18); Blue x 30: 5.0mm diameter,1.5-2.5mm² cable section (A.W.G: 16-14); Yellow x10: 6.0mm diameter,4.0-6.0mm² cable section (A.W.G: 12-10); Heat Shrink Tube: 200pcs x φ4.0 x 20mm (Black)(shrink ratio:1:2). [PREMIUM SOLDER SEAL RING] Tubing reduces in size, the enough solder will melt and flow through the stripped wires, ensure a long lasting connection for your application. [BETTER WATERPROOF SOLUTIONS] Double wall design, Hot Melt Adhesive inside ensures wires strongly connected and prevent wires slipping from the terminal; Polyolefin outside tubing provides insulation and improves pullout strength. [ABRASION RESISTANCE HEAT SHRINKABLE TUBE] Premium tube materials are specially designed to be used in harsh environments. Protect the wires and cables from abrasion, cutting, scuffing and low impact situations. [WIDE APPLICATIONS] Excellent stability, water resistance and electrical conductivity provide durable connection for motorcycle, off-road vehicles, lawn tractors, RVs, fish finder and marine application. Widely used on multiple projects of your Christmas lights, ships with high waterproof requirements motorcycle stereo, boat electronics, equipment switches. [EXCELLENT WIRE CONTACT] The tin barrel provides increased current flow, and ensures less voltage drop, preventing wiring failures and reducing equipment downtime. How to Use: 1. Select the proper size of the heat shrink tubing for the using. 2. Insert the wires to the heat shrink tubing. 3. Use the heat gun or lighter to shrink the tube until it is melted in size and the adhesive flows, filling the gaps between wires and tube. 4. Don’t touch the tube until it is cool completely.