This is the Progressive-1 Rocker Arm Set for the Traxxas Revo. They are part of the suspension and act as a cantilever system for the Front & Rear Shocks. FEATURES: Plastic construction Gray in color Progressive 1, Low Rate INCLUDES: One Left/Front Upper Rocker Arm One Left/Front Lower Rocker Arm One Right/Front Upper Rocker Arm One Right/Front Lower Rocker Arm One Left/Rear Upper Rocker Arm One Left/Rear Lower Rocker Arm One Right/Rear Upper Rocker Arm One Right/Rear Lower Rocker Arm REQUIRES: Assembly to vehicle If Pivot Bearings are needed, use TRAC5116 If pushrods are needed use, TRAC6318 SPECS: Progressive Rate: One (Low) Total Travel: 90mm (60mm up/30mm down) 3.54" (2.4" up/1.2" down) COMMENTS: Other Progressive Rates are available: TRAC5358 Progressive 2 Medium TRAC5359 Progressive 3 High TRAC5356 Long Travel Low - 120mm (80mm up/40mm down) 4.72" (3.2" up/1.6" down) NNA 8/10/04 ir/jxs updt jxs 12/16/04