4Pcs 2 Port Insulated ?Splice Connector Black Interconnect Terminals, 4Pcs Product Details ?Product Standard?The dimensions are 2.09"L*1.89"W*1.82"H.Cable application range:Cu 3/0-6AWG?CU9AL 600V ,90C,temperature range of -49 to 194 degrees F.Pack of 4pcs ?UL Listed?This insulated connector helps to ensure a safe and secure connection between aluminum and copper wires, which can help prevent electrical fires that may be caused by mixing conductors. It is also worth noting that this connector has been UL certified. ?Quality material?The insulation is made of high dielectric strength rubber and vinyl, coated for long-term use. It is suitable for use with aluminum or copper wires and has a built-in lubricant for oxidation resistance. ?Widely used?This connector is designed to safely connect cables in various wiring environments and with different wiring materials, including copper-to-copper, aluminum-to-aluminum, and copper-to-aluminum. ?Simple use?Our insulated terminals are designed for easy inspection and troubleshooting. They are internally preloaded with oxidation-resistant lubricants, making them an ideal wiring tool. 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.