Features: Made with heat shrink material, crimp with a true plated copper core. When properly heated and shrunk, they provide a seal that is resistant to water, steam, salt and other contaminants. Heat shrink insulated connectors will provide improved pullout strength and strain relief. The translucent heat shrink material allows visual inspection of the connection, and included almost frequently-used connectors' size. Excellent splice for marine, automotive, outdoor, or harsh, environment use. Specification: Quantity: 200PCS Material: PE+Copper Color: Red, Blue, Yellow Type: Heat Shrink Butt Connectors Size & Quantity: Red Connectors: AWG 22-18 fit Wire/Cable 0.5-1.5mm2 (90PCS) Blue Connectors: AWG 16-14 fit Wire/Cable 1.5-2.5mm2 (90PCS) Yellow Connectors: AWG 12-10 fit Wire/Cable 4.0-6.0mm2 (20PCS) Package including: 200pcs Heat Shrink Butt Connectors