This is the Team Integy MSR9 Rear Piggyback Shock Set for the Traxxas Stampede and Rustler. FEATURES: Aluminum Construction Threaded Aluminum Shock Bodies Piggyback Shock Oil Reservoir Knurled Spring Rate Adjuster Blue and Gun Metal in Color Aluminum Lower Spring Retainer Fully Assembled 2-Hole Shock Pistons Nylon Ball Ends w/Metal Ball INCLUDES: Two Fully Assembled Piggyback Shocks Two Blue Springs Two Red Springs Two Shock Mounting Bushings Two 4-Hole Shock Pistons Two Foam Compression Pads REQUIRES: Installation on the vehicle SPECS: Length: approx. 4.01" (102mm) fully extended from mounting hole to mounting hole Diameter- Shock- Shock Body: .51" (13mm) Spring- Spring Overall: .70" (18mm) Wire Diameter: .05" (1.5mm) COMMENTS: For Tuned Spring Set, order INTC2392 tlw 7/2/07 ir/jxs