Wide range aluminium tap connectors R die seven connector program. For combinations of aluminium-aluminium and aluminium-copper conductors. Pass the requirements of ANSI C119.4. Standard compression tools and dies install all sizes. Seven connector program provides superior connector performance, lower connection costs and simplified installation procedures. Fold-in tabs provide positive tab interlock as tool closes. Field-proven ribbed design provides unparalleled connector/conductor contact, without distorting the conductor's shape. Made of 1350 aluminium alloy. Pre-filled with an oxide inhibitor which is held captive in the rib/connection area.