PACKAGE CONTENTS: 25 PCS of Heavy Duty Bare Copper 00 Gauge (AWG) 1/4" Ring Battery Terminal Connectors / Lugs; 100% annealed copper, providing a high degree of conductivity for maximum current flow when used as battery terminals DURABILITY: Approved by OEMs, our electrical wire ring connectors are designed with a heavy duty construction for high temperature durability and enhanced mechanical strength WIDE APPLICATIONS: Selterm copper lugs wire connectors have a close end pad design, keeping electrical components, battery and ring terminals safe and act as waterproof wire connectors which prevents solder from leaking during installation of lugs or while using as a heat shrink wire connectors for your battery in Solar Panel system, Golf Carts, Power Inverter, RV's, Marine, Home appliances, DIY Electrical wiring, Automotive and other equipment PERFECT FIT: Selterm provides freedom to choose from a wide range of wire sizes, stud sizes, and pack quantities from 2 - 25 pcs best suitable for all requirements and applications as battery connectors; Superior material quality of copper terminals lugs can be crimped or soldered; Use with a compatible copper cable; Audio wire may not be a direct fit; Recommend to check product dimensions to ensure a proper fit of the connectors HEAVY DUTY WIRE LUGS: Our ring terminal connectors are tested to meet S.A.E conductivity standards J163 & J1811; UL listed to U.S. & Canadian safety standards and rated to 600V+ when properly installed; RoHS & REACH compliant; These Battery Wire Connectors are listed under UL File Number E254830