Winchester Airgun Target Cube 3 bullseye targets on each side 2 sides for guns under 350 fps muzzle velocity 2 sides for guns over 350 fps muzzle velocity* 8.25"x8.25"x8.25" Place target cube at least 5 meters from muzzle of gun Use only .177-caliber lead pellets or steel BBs 1 lb. The Winchester Airgun Target Cube can take just about anything you can dish out! Two sides will absorb pellets and BBs from guns with a muzzle velocity under 350 fps. The other 2 sides are robust enough to take hits from BB and pellet guns that have a muzzle velocity of 350 to 1200 fps! Use only .177-caliber lead pellets or steel BBs. Place the target cube at least 5 meters from the muzzle of the gun regardless of your gun's velocity. *The target cube is filled with foam, but the side for higher-velocity guns also has a steel insert. No matter what you shoot, remember to look at what lies beyond your target. If you miss, be sure to have a backstop that will stop any stray ammo.