The Ilsco CSWS-4-14 SureCrimp Copper Compression Lug offers reliable and secure connections for your electrical applications. Designed for use with copper conductors, this lug features a standard barrel and a visual inspection window for easy verification of proper crimping. Its plated tin construction ensures durability and conductivity.This Ilsco SureCrimp compression lug, model CSWS-4-14, is constructed from copper and features a standard barrel with a visual inspection window. It is plated with tin for enhanced conductivity and corrosion resistance. The lug is designed for a conductor size of 4 AWG and accepts a 1/4 inch bolt size. It is rated for 120V and 600V applications and is UL and CSA listed.