BuyUneed 4:1 Black Heat Shrink Tube 4:1 heat shrink tube it will shrink up to 1/4 of original rapid contraction to raise efficiency and can be used for the contraction protection on more applications and its high recovery ratio makes it possible to repair most damaged cable jackets at the same time solve the problem that the 2 :1 Ratio heat shrink tube is not tight enough after shrinking. 4:1 SHRINK RATIO shrink to 1/4 of original diameterTighter fit than 2:1 with no air gaps4:1 shrink Slides over larger objects4:1 high shrinkage, suitable for multiple wire gauges Dual Wall Adhesive Heat Shrink Tubing Adhesive Lined, Marine Grade Shrink Wrapflexibility,High temperature resistant, safe and reliableMore Wear resistant,Strong connection Not easy to tearExcellent flame retardant and insulation performance Soft Waterproof Shrink Tubing Seal wire and soldered connectionsWaterproof Chemical resistance,acid and alkali resistanceExcellent Insulation performance Heat Shrink Tubing-Easy to use That you just need to use the heat gun to heat evenly until it tightly wraps or connects the wires (The temperature of the hot air gun needs to be as high as 212°F, and the lining glue will soften and seal the connection. ) Make your amateur DIY more professional Including any size you may need. From professional maintenance to DIY work at home, the 4:1 shrinkage ratio of the heat shrinkable tube and glue make the connection between the sleeve and the cable relatively tight and orderly. Provides excellent protection for electronic components, wire splices, harnesses and harness branches;Electrical insulation (wire repair, insulated terminal wires, insulated solder joints);Insulation and sealing to prevent dust from entering the interior;Protects wires from wear and tear for longer life；Identify wires and cables；The inner lining glues evenly and thickly after shrinking；Environmental certification (does not produce dioxins);BuyUneed heat-shrinkable tubes are UL and CSA certified, RoHS compliant. Make your amateur DIY more professional Including any size you may need. From professional maintenance to DIY work at home, the 4:1 shrinkage ratio of the heat shrinkable tube and glue make the connection between the sleeve and the cable relatively tight and orderly. Provides excellent protection for electronic components, wire splices, harnesses and harness branches;Electrical insulation (wire repair, insulated terminal wires, insulated solder joints);Insulation and sealing to prevent dust from entering the interior;Protects wires from wear and tear for longer life；Identify wires and cables；The inner lining glues evenly and thickly after shrinking；Environmental certification (does not produce dioxins);BuyUneed heat-shrinkable tubes are UL and CSA certified, RoHS compliant. A wide range of applications of Shrink tubing 4:1 heat shrink tube can be used for the contraction protection on more applications for Shrink Wrapping, Hand Crafts DIY etc, audio cable , speaker cables , phone cord , guitar wiring , eye glasses etc repairingfor electrical insulation, wire/cable joints and daily repairs etc, audio repairsfor wire bundling, color coding Harnessing Mechanical protection Wire marking Strain Reliefworks well for protecting headphones and phone cables,seals the connection from the elementsCover all gauges of wires you'll need in RC hobbies and submersible pond light Christmas display , LED , DIY etc splicing or adding wiring many other applications.fitness equipment handle and steel structure surface protection etcAutomotive , motorcycles , ATVS , boats , guitar amplifiers , AC power adapters , electrical panel , Waterproof Black Heat Shrinkable Tube 4:1 Note:Measurements are approximate, variance of a 2 - 8% are common, that is the nature of heat shrink tubing. Product Heat Shrink Tubing Heat Shrink Ratio 4:1 Material polyolefin Heat Shrink Tubes Size 1/4inch 1/2inch 3/4inch 5/8inch 1inch Heat Shrink Tubes Color Black withstand voltage 600 V Shrink temperature 85 ℃- 125 ℃, How to Use? Select the proper size ,repair wire connection;Connect the wire and put on the shrink tube;Heat the shrink tube with Heat gun to shrink it(When the Heat-shrink tube shrinks the glue on the inner wall will melt and then it will be adsorbed on the surface of the object tightly);Wiring completed,Don’t touch the tube until it is cool completely.