We are OEM BBs manufacturer in Shandong. Our products are suitable for spring airsoft, AEGs, gas rifles and or pistols. Description: a. Seamless, roundness, well polished with high precision and without air pockets. b. Weights:0.12, 0.20, 0.25, 0.28, 0.30, 0.35g per shots. c. Diameter: 5.95mm d. Tolerance: +/-0.025, +/-0.02, +/-0.015, +/-0.01 and -0.01mm e. Colours: we supply colours as customers request. f. Packing: as customets request. g. Sampling: as customets request.