1. G-clamps are made by progressive die,20000pcs per day 2. zinc plated 3. 2.5mm 3mm both are available G-clamp, 1. G-clamps are made by progressive die,20000pcs per day2. zinc plated 3. 2.5mm 3mm both are availablecan be used in conjunction with all rectangular slide on flange systemsour facotry passed ISO 9000 certification. G-clamp flange