Heat shrinkable connector supports insulation, which built to strict quality control standards. Supports wide application in marine and automobile, waterproof glue supports thermal activation. And waterproof solder connectors prevent cable corrosion, which is helpful to solder and seal. White heat shrink connector size: approx. 1.7mm / 0.07in. Red heat shrink connector size: approx. 2.7mm / 0.11in. Yellow heat shrink connector size: approx. 4.5mm / 0.18in. Blue heat shrink connector size: approx. 6mm / 0.2in. Comply with ROHS, ISO 9001:2008, SGS and CE standards. Double-wall design pipes means that polyolefin pipes inside, hot-melt glue outside. Improved for more durability, solder connector keeps guaranteed quality, used with confidence. Compliant with all electrical standards, Perfect for marine and automobile applications, whether you are working on your boat, Vehicle, Home or scientific project, our electrical crimp connector will ensure strong watertight seal to make sure everything correctly