Browse Our Selection › Eisco Labs 50g Zinc Casted Slotted Mass Spare/Replacement Image 1 of 2 Image 2 of 2 Eisco Labs 50g Zinc Casted Slotted Mass Spare/Replacement $2.96 Zinc die casted, powder coated and accuracy �2%. Excellent alternate for expensive brass weights.Mass inscribed on unit50g massZinc die casted, powder coated and accuracy �2%. Excellent alternate for expensive brass weights. Quantity: Add To Cart Added! Zinc die casted, powder coated and accuracy �2%. Excellent alternate for expensive brass weights.Mass inscribed on unit50g massZinc die casted, powder coated and accuracy �2%. Excellent alternate for expensive brass weights.