500DFC Main Rotor Housing Set Use for T-REX500DFC (H50181) 6061-T6 Aluminum alloy material and CNC processed. The damper rubbers are manufactured utilizing POM material, sleek surface, with superior anti-wear characteristic. Specification: 500DFC Main Rotor Housing x 1 500DFC Damper Rubber x 2(POM ?6x?11x4mm) Feathering shaft sleeve x 1 Locking nut(M2.5) x 1 Socket Button Head Collar Screw(M2.5x16mm) x 1 Weight:23g