1、Solder sleeve's waterproof glue adopts thermal activation, such solder connector can be applicated to marine or automobile. 2、Depends on 500PCs quantity, your needs can be met and this connector keeps high practical adoptability. 3、Keeps high practicality, lightweight heat shrinkable connector can be insulation , which supports guaranteed quality. 4、With double-wall design pipes, such solder terminal adopts polyolefin pipes inside and hot-melt glue outside. 5、Beneficail to solder and seal, waterproof solder connectors can prevent cable corrosion. 20 x Solder Connector Yellow 6.0mm50 x Solder Connector Blue 4.5mm50 x Solder Connector Red 2.7mm40 x Solder Connector White 1.7mm340 x Solder Connector Black Item Type: Solder connectorMinimum Temperature of Solder Melting: 138℃Minimum Retraction Temperature: 80℃Working Temperature: -55-125℃Retraction Temperature: > 160℃Complies with: ROHS, ISO 9001:2008, SGS and CE standards.Size:Yellow Heat Shrink Connector Size: Approx. 6mm / 0.2inBlue Heat Shrink Connector Size: Approx. 4.5mm / 0.18inRed Heat Shrink Connector Size: Approx. 2.7mm / 0.11inWhite Heat Shrink Connector Size: Approx. 1.7mm / 0.07in