***** **********Best Quality Guranteed. *****FOR BALANCING CAMERA ON GIMBAL counterweight 50g is designed to balance your camera on Gimbal Stabilizers by adjusting the quantity and position*****STACKABLE VIA 1/4"-20 SCREW AND HOLEDesigned for easy stacking, this counterweight features a 1/4-20 screw on one side and a 1/4-20 threaded hole on the other to add more counterweights if necessary*****SURFACE INCREASE FRICTION DESIGNFor easy installation and detachment, the unsmooth surface features lines to increase friction*****MADE OF STAINLESS STEEL AAW2459 is made of stainless steel, corrosion resistance. Optional 100g Counterweight AAW2284 and 200g Counterweight AAW2285 are provided if needed*****MOUNTING PLATE SOLD SEPARATELYIt is compatible with counterweight mounting platessold separatelyvia a separately available mounting plate, such as Ronin-SC Counterweight Plate BSS2420, Ronin-S Counterweight Plate BSS2308 and other counterweight plates for Zhiyun gimbals