100 X .68 Cal Paintball Kinetic Rounds for Self Defense and Practice, Reusable .68 Caliber Paintball Ammo Solid Nylon Balls Projectile Fit for Byrna SD/LE/EP, Salt Supply S2 and T4E HDR68 (3.7 Grams)Solid Nylon Paintballs of . 68 Cal, Ultra Hard, Seamless, Fly Straight,Accurate Cheaper Than Filled Paintballs. The Nylon Paintballs are Reusable for Thousands of Times. 3. 6 G of Each Ball. This 68 Caliber Nylon Ball Shoots Smoother and Harder Than Rubber Paintballs. Perfect for Target Shooting. Fit Perfectly for Byrna SD, T4E HDR & T4E HDS and Any Other Standard 0. 68 Cal Paintball Markers Bright Gold Color , Easy to Find.