This is a 5 pack. The GUALBO STEEL 12ga slug is an expanding 504 grain ( 1 1/8 oz ) steel slug with petals that peel back upon impact to maximize the slug’s energy transfer and create a devastating wound channel. The central upper pin guarantees stability and precision, both in trajectory motion and at the moment of impact against the subject. To maximize the final damage, the front petals have been projected in order to come off the main body of the slug once it penetrates the tissue for about 10 cm. The plastic body has been developed with lateral tongues that hold the steel slug and come off the central body immediately upon discharge from the barrel. This central balance not only guarantees the equilibrium and precision of the Gualbo Steel slug but protects the barrel from potential damage. DO NOT FIRE THE GUALBO SLUG THROUGH A CHOKED BARREL. Make sure to read our Shipping Policy in regard to ammunition.