Hop-Up replacement Shock Caps (Big Bore) are designed to fit Traxxas Big Bore shocks: TRAC4960 Long Big Bore TRAC4961 Extra Long PACKAGE CONTAINS: 2-Caps FEATURES: Round aluminum caps with threaded inside COMMENTS: Rubber diaphragn is not included 6/27/94sk BOX DIMENSIONS: 2.50" W. X .63" H. X 3.00" L. BOX WEIGHT: .02 LBS.