Rubber Damper Balls for Flight Controllers, M2/M3

Rubber shock absorber balls (anti-vibration grommets) for soft-mounting a flight controller, sold four to a pack. They sit between the board and its standoffs and keep frame and motor vibration away from the gyro. The result is cleaner gyro data and less work for the filters. Choose M3 or M2 to match your board's mounting screws.

Key features

• Four per pack, one for each hole on a standard four-hole board
• M3 size fits boards on M3 hardware, usually 30.5x30.5 stacks
• M2 size fits boards drilled for M2 screws, which are common on 20x20 and smaller stacks
• Replaces grommets that have torn, hardened or gone missing

Specifications

• Sizes: M3 or M2
• M3 dimensions: 3mm inner diameter, 6mm outer diameter, 4.5mm high
• Quantity: 4 pieces
• Material: rubber

Tighten the stack nuts until the board is held firmly but the rubber is not squashed. A crushed grommet goes rigid and stops damping. Order one pack per board, or two packs for a flight controller and ESC stack.