This is the main diff gear for Hawk II. The gear is black plastic. ' Includes: 1 main diff gear 1 diff gear cover plate 4ea 2x5mm machine screws Requires: Planetary and sun gears (TRAC6382) pcd 1/16/94 BOX DIMENSIONS: 2.50" W. X .75" H. X 3.00" L. BOX WEIGHT: .03 LBS.