Thirty (30) .50 caliber reusable Gel Paintballs! These Stryke Zone Flexballs will fit in any .50 caliber Paintball gun! They work especially well in the JTSplatmaster pump pistols and shotguns! The soft, gel flexballs are safe both indoors and outdoors. They are reusable! Always wear eye and face protection. Never shoot at other people or animals.