Model Number: HD-DF Brand Name: HUADA Key Specifications/Special Features: Suitable for grinding and polishing the surface of various kinds of stones slab in automatic polishing line machinesWith feature of good polishing efficiency and very long using lifespan in grinding stone slabsLifespan range: 8,000 to 12,000mSize: (L) 140 x 15 or (L) 130 x 15mmGrit numbers: #30, #40, #50, #60, #80, #120 and #230