These are the Shock Springs: Rear Silver 73gf/mm (Black) By Team Durango FEATURES: This is an official Team Durango spare/optional part constructed from high quality materials. This spring has the Black compression rating. INCLUDES: Two springs COMMENTS: This spring is an optional part for DNX408v2 1/8 Nitro 4WD Off Road Buggy (TDRC0210) DEX408 1/8 Electric 4WD Off Road Buggy (TDRC0300) DNX408T 1/8 Nitro 4WD Off-Road Truggy (TDRC0220) 8/1/12 pjw ir/jxs