BB quality is very important, as malformed BB"s could easily damage the barrel of the airsoft weapon or the hop up systeim. Airsoft BBS Item No.:5025WSpecifications:0.25g, Roundness, Very High Grade Precision, 5.95±0.01, High Hardness, Reflet, with white color.Application:For use in higher end spring airsoft rifles, AEGs, gas airsoft pistols, or higherPacking:3000 Rounds/Bag 20Bags/ctn