160970 4in MK-250GXT Turbo Dry Porcelain Blade by MK 4″ MK-250GXT Turbo Dry Porcelain Blade Dry cutting, turbo rim diamond blade. Clean chip-free cutting on porcelain and granite. 7/8″-5/8″ arbor 7mm rim height . Posted in Dry Diamond Blades For Porcelain & Granite, Tile & Stone Diamond Blades, Tile & Stone Tools tagged with MK