1.This series of products are with high intensity 2.wear-resist 3.insulative 4.smooth surface,good hardness 5.good quality Features: 1) This series of products are with high intensity, wear-resist, insulative, the surface is smooth and polishing2) Our current spec is 100mm x 45mm x 3mm, 100mm x 30mm x 5mm, 100mm x 25mm x 5mm, 100mm x 20mm x 2.5mm3) Two colors: white and black Alumina balls, ...