Everything you need for a professional military spec battery terminal conversion. Great for multiple battery installations in race cars, off-road vehicles and RV's and anywhere battery performance is critical. Kit Includes both positive and negative specific Fastronix mil spec top post connectors, (4) 2 gauge 3/8" copper lugs, (4) 3/4"x 1-1/2" adhesive lined heat shrink for superior cable sealing and protection and a pair of Fastronix mil spec battery terminal covers to prevent accidental shorting and give your install a professional look. (Battery Cable Not Included). Note: Heat shrink requires use of a butane torch or heat gun in order to activate the adhesive lining and seal the connection. NOTE: Copper lugs that are included are for 2 gauge wire only, 2/0 gauge wire is a larger diameter and requires a different lug. 2 gauge copper lugs and heat shrink are not made in the USA.