Features and Benefits:?20 oz sausage style barrel accepts all standard 20 oz sausage material packages?For use with all M18? caulk and adhesive guns?Barrel - aluminum?Conversion from clear to aluminumFor use with M18? cordless caulk and adhesive guns. This kit includes only the 20 oz aluminum barrel. The 20 oz sausage style plunger rod and piston assembly are sold with the 48-08-1093 aluminum barrel conversion kit. This kit includes the necessary component to convert barrel styles from the 2643-21CT 20 oz clear barrel sausage style caulk and adhesive gun kit to an aluminum barrel.