This is the Traxxas Caps and spring retainers, GTR long/xx-long shock (upper cap (2)/ hollow balls (4)/ bottom cap (2)/ upper retainer (2)/ lower retainer (2)). This is Traxxas part number 7468
Part Number: 7468 / TRA7468
Slash 4x4 Platinum
Slash 4x4 Ultimate
More detail coming soon! Please check your vehicle manual to confirm vehicle fitment, or contact us if you have any questions.