Hobbypower 3K CF 3108 3508 4108 4114 Motor Mount for 16mm Pipe Arm DIY Quadcopter FY650 (pack of 4 pcs) Apply to 16mm arm/tube clamp( only can work on 16mm pipe Multi-rotor) Suit for all heavy-lift multi-rotor brushless motor (example: Sunnysky X3108S, X3508S, V3508, X4108S...etc, T-Motor 4004, MN3508, MN4014, MN4006, M3506 MN3510...etc, Tarot 4108, 4006, 5008, 4414, 6115...etc) Also this motor mount is same as the Tarot FY650, can use as spare part or replace for FY650 quadcopter. Made of 3K carbon fiber