APEXX Gold CNC Super Z Wheel. Diamond Height: 45mm. Diamond Diameter: 80mm. Materials: ES, Granite, Quartzite. Suggested RPM: 4,500 -- 6,000. Feed Rate: 800 -- 2500 mm/min. Built with advanced metal bond and premium diamonds; Simple design, excellent performance; Best selling APEXX Super Z wheels; Recommended for regular stock removing (1-4mm per pass); Feed rate 800-2500 mm/min; Standard 35mm arbor; Material: Engineered Stone, Granite, Natural Quartzite; Wet use only.