Acratech GP-s Ballhead with Quick Release Lever, Supports 25 lbs. Works as a gimbal head with lenses up to 400 f4.0 Easily holds over 25 lbs (11.4kg) at any angle Full movements allow any camera position Compatible with Kirk, Arca, R.R.S. and many other QR plates Fits all standard tripods (1/4-20 and 3/8-16 threads)