for marble and granite quarry. stable cutting and long lifespan. best price best quality DIAMOND WIREOutside diameter of diamond ring(mm) :11.5,11 ... ,10.5,10,8.5Inside diameter of diamond ring(mm) :9.0, 8.5, 8.0, 6.0Length ... of diamond ring(mm):6.0Length of steel core (mm):8.5 ...