Solder and seal and with advanced waterproof function. Polyolefin heat shrink butt connectors improved pullout strength, provides seal, strain relief, cable check, and insulation. Yellow Heat Shrink Connectors: Suits cable / wire sizes 12-10AWG / 4.0-6.0mm2 Black Heat Shrink Sleeve (3.2mm, 20mm Long). Leia Mais