All connectors use American made terminals with 3m brand medium wall sealant heat shrink. Make sure to purchase this item only from Connector Supply. Buying from other vendors that have listed on our product page runs you the risk of receiving sub par connectors. 480 piece assorted heat shrink automotive electrical connector kit. These are perfect connectors for marine use. All connectors use American made terminals with 3m brand medium wall sealant heat shrink. These are quality connectors and come with our money back guarantee. 20 pcs. - 22-18 Heat Shrink Butt 20 pcs. - 16-14 Heat Shrink Butt 20 pcs. - 12-10 Heat Shrink Butt 20 pcs. - 22-18 Heat Shrink Ring #10, 1/4, 5/16, 3/8 20 pcs. - 22-18 Heat Shrink Spade #10 20 pcs. - 16-14 Heat Shrink Ring #10, 1/4, 5/16, 3/8 20 pcs. - 16-14 Heat Shrink Spade #10 20 pcs. - 12-10 Heat Shrink Ring #10, 1/4, 5/16, 3/8 20 pcs. - 12-10 Heat Shrink Spade #10 20 pcs. - 22-18 Heat Shrink Quick Disconnect .250 Male & Female 20 pcs. - 16-14 Heat Shrink Quick Disconnect .250 Male & Female 20 pcs. - 12-10 Heat Shrink Quick Disconnect .250 Male & Female Made In The USA