These are super simple replacement motor mounts for my Turnigy Talon v2 quad copter but should fit any 14mm carbon tube. Standard mounting holes, should fit most small motors. *Update: I have reinforced the top clamping section to make it significantly sturdier.These are designed to use two M3x10mm or longer bolts and small hex nuts to fit. I used 35% infill on the motor mounts themselves and they are incredibly strong yet light weight (right at 13g). For the top clamping portion of the mount I suggest printing at 100% infill for maximum strength. Additionally, if you're using this to replace bent or broken motor mounts from your Turnigy Talon v2 you can use the aluminum clamps in place of the printed ones. The overall weight of the printed mount with screws is 18g, lighter than the original Talon mount at 26g, and much easier to replace.