Made of Stainless steel. It has high durability against high speed operation and heavy load. The "double oil tank" design features very good lubricity to reduce the friction.
Area 1000 Oilless Metal Bushing Set. These bushing are the most commonly used reinforced bushing on the market. Inexpensive and reliable performance make this a good choice for any gearbox upgrade.
Systema Ball Bearing bushing set for Version 2, Version 3 and compatible gearboxes. Recommended for use with high speed/low torque applications. Not compatible with Marui M1A1 or P90 style airsoft guns.