Product Name:GB-09　Modular Gear Set (Speed/Torque) Compatible with Ver.2/Ver.3 gearbox. Patent pending. Material： Steel /Thermal Treatment Includes: 1) Modular Gear Set with Tempered Stainless Bushes(Double Oil Grooves)/ 2) Stainless Bushes/ 3) Anti-reversal latch/ 4) Synthetic Lubricant with PTFE GB-09-11　　Modular Gear Set for Marui Ver.2/3 (Torque 21.6:1) GB-09-12　　Modular Gear Set for 6mm gearbox Ver.2/Ver.3 (Torque 21.6:1) GB-09-13　　Modular Gear Set for 7mm gearbox Ver.2/Ver.3 (Torque 21.6:1) GB-09-14　　Modular Gear Set for Marui Ver.2/Ver.3 (Speed 16.32:1) GB-09-15　　Modular Gear Set for 6mm gearbox Ver.2/Ver.3 (Speed 16.32:1) GB-09-16　　Modular Gear Set for 7mm gearbox Ver.2/Ver.3 (Speed 16.32:1) Note: It is not compatible with those reenforced Ver.2 gearbox.   Inquiry