Sockets for convenient connection of external devices,Reserve multiple external device sockets, plug and play. 25.5mm x 25.5mm hole pitch fly tower,Two sets of shock-absorbing glue, compatible with M3 or M2 screw installation. Strong heat dissipation, more stable. Hign-concerned Chemical:None Use:Vehicles & Remote Control Toys Wheelbase:Screws Model Number:for TAKER F722 BL32 E55A SE Stack For Vehicle Type:Helicopters Tool Supplies:Assembly Category Four-wheel Drive :AIO Remote Control Peripherals/Devices:ESC The product appearance and printed words depending on the batch, but this does not affect use. Colour:As Shown Material:PCB Package Contents: 1 * For TAKER F722 BL32 55A SE STACK Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.