NC machined aluminum shock bodies red anodized shock bodies upper and lower shock ends includes red anodized aluminum balls 3.5mm thick shock shafts shaft exits through double O-ring seals easy load shock seal assembly laser engraved for authenticity fits 1/10 scale Crawlers & trucks (such as Tamiya high-lift series, Axial SCX10) what's included: red anodized aluminum shock bodies x 4 shock Springs x 8 all necessary hardware to finish the shocks assembly instructions bottle of shock oil specs: length (mounting hole to hole): 80mm (for droop set-up), 87mm (for sprung set-up) shock body diameter: 14mm spring diameter: 10mm spring length: 13mm, 20mm full shaft travel range: 26mm shaft diameter: 3.5mm.