Single finger and double finger are applicable. It maximizes the pleasure for the thumb to feel, while also taking into account the anti slip design of the side index finger. The side adopts a concave design, which is more in line with the index finger. Height adjustable. Screw rod adaptation. Tolerance test: Continuous exposure to sunlight for 6 months without cracking, with a service life of approximately 500 hours (data affected by finger skin roughness, grip strength, and control method). M3D compatible models: for TBS tango2 pro folding style ultra short joystick for EL8, PL8 joystick Specification: Item name: joystick/stick ends/rocker cap Maximum diameter: 11.3mm Height (excluding positioning nut): 16.6mm Installation method: 1. Unscrew the old joystick head. 2. Screw in the included positioning nut. 3. Screw in the joystick head. 4. Use the wrench to reverse tighten the rocker head and nut. Note:The remote controller and others in picture shown not include. Color:A:Black Material:PVC Package Contents: 1 * joystick cap 1 set * accessories 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.