Feature 1Qualified solder seal heat shrink wire connectors, which can fully meet your needs in various wiring projects. 2The melted solder ensures that the wires are firmly connected and prevent the wires from slipping out of the terminals. 3Made of premium quality plastic, this terminals have excellent sealing, strain relief, cable check and insulation properties. 4Features 2:1 shrinkage ratio, 55 125 operating temperature, 80 minimum shrink temperature and 138C lowest solder melting temperature. 5Can be used in ships, vehicles and home, brings firm welding, increased current and weatherproof connection.Item Type: Solder SleeveMaterial: PlasticQuantity: 1 Box (250pcs)Solder Sleeve White SST-S11(40PCS)Solder Sleeve Red SST-S21(100PCS)Solder Sleeve Blue SST-S31(90PCS)Solder Sleeve Yellow SST-S41(20PCS)Size:Red connector: Approx. 2.7mm/0.11in in diameter, cable cross-section 0.5 to 1.0mmBlue connector: Approx. 4.5mm/0.18in in diameter, cable cross-section 1.5-2.5mmWhite connector: Approx. 1.7mm/0.07in in diameter, cable cross-section 0.25-0.34mmYellow connector: Approx. 6.0mm/0.24in in diameter, cable cross-section 4.0-6.0mmOperating Temperature: -55 to 125 (-67F to 256F)Minimum Shrink Temperature: 80 (176F)Lowest Temperature of Solder Melting: 138C (280.4F)Shrinkage Ratio: 2:1Temperature that Start to Shrink: 80Temperature that Solder Ring start to Melt: 111Temperature that Solder Ring Melt Completely: 138Application: Whether you are working on your boat, vehicle, home or scientific project, our heat shrink solder and seal connectors will ensure solid soldering, increased current flow and weatherproof connections every time. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 Box of Solder Sleeves (250pcs)