37055 Features: -Includes H541 collar, H548 SD stem, H549 "O" ring, H572 adjusting sleeve, H583 insert plug, H584 rubber seat, and SH406 spring. -Carded. -Rebuilds 1" screwdriver stops H600-A, H600-AG, H450-A, H540-AG, H650-AG and H545-AG. -Reference No. 3308853. -Dimensions: 1.25" H x 4" W x 5" D.