Shock shaft, eyelet and spring This is a pair of Shock Shafts and Spring Perches for the Arrma Granite Mega 4x4 Monster Truck, and the Senton Mega 4x4 Short Course Truck. FEATURES: For front and rear shocks Steel shafts Molded plastic spring perches form bottom attachment part of shock and holds spring in place INCLUDES: Two Shock Shafts and Spring Perches SPECS: Shaft Diameter: 0.12" (3mm)