1000 Pcs Heat Shrink Butt Connectors, 16-14 Awg Waterproof Electrical, Wiring Product Details Package Includes: 1000 Blue heat shrink butt connectors that can be used on wire AWG from 16 to 14. Tinned Copper Core: Butt connectors use a heavy-duty copper core, strong crimp, and higher conductivity. Solderless Crimping: Insert the wires to be connected, crimp both sides with crimping pliers, and then heat with a heat gun. 3:1 Shrink Ratio: Marine grade heat shrink tubing provides high tensile strength and enough hot melt adhesive inside the tubing to ensure waterproof performance, your wires will never slip out of the wire connectors. Wide Application: Heat shrink wire connectors are waterproof, stable, and corrosion-resistant and are used in the automotive, marine, electrical, and electronic industries. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.