This is a HPI 100950 Shock Shaft 3.5x90mm (4pcs)

Genuine HPI quality spare part for easy maintenance and repairs. See below for kit reference.

THIS PART FITS THE FOLLOWING KITS / PARTS:
BIG BORE SPORT SHOCK SET...
SAVAGE X 4.6 GT-6
SAVAGE X FLUX V2
Savage XL 5.9 GTXL-6
SAVAGE XL FLUX V2