Greenten Electric Bone Nut Cattle Bone Slotted Replacement,Flat Bottom 100% as picture show,the quality is better than bone meal Material:Cattle bone size: 43 X 6 X 8.5mm(1.692 X 0.236 X 0.334 inch),The item middle height is 8.5mm,height arrange(7.75-8.6mm) Flat Bottom