FAST & EASY TO USE - No crimp tools or soldering machine recquired. Only heat is needed to finish the connection. Clear sleeve allows accurate inspection when stripping and inserting wires inside.COMPLETELY WATERPROOF - Double-walled design - Polyolefin outer tube provides insulation and improves pull-out resistance; Hot melt adhesive and solder inside the wires are connected and prevent the wires from slipping out of the terminal.FIT FOR LIMITED SPACE AREAS - Can be bent after connection and no need to solder or crimp, just heat with a heat .MANY APPLICATIONS - Shrinking : 2:1. Perfect to use for vehicle, motorcycle, automotive, boat, and all outdoor applications.Waterproof seal-dual-walled tubing ensures waterproof seal and prevents wire corrosion.Transparent sleeve provides precise inspection and easy control of soldering process.The solder seal splice is characterized by watertightness, corrosion prevention and insulation, helping to rid of electric accident.Size: length: 40 mm/ 1.57 inchParameters:Working temperature: -55 degrees centigrade to 125 degrees centigradeShrink temperature: more than 160 degrees centigradeProtection level: IP67Dielectric strength: 1KVColour: multicolorMaterial: PolyolefinSize: 19.56 x 13.00 x 4.01 cmPackage Contents:600 x Solder seal heat shrink butt wire connectors (Yellow 50 + Blue 200 + red 200 + white 150)Only the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.