SMC CK1 Z CKG1 Z Series Clamp Cylinder, Auto Switch Band, CKG1A63 50Z X1515 Dual Purpose Urethane Hammer Mounting Basic Bore 50mm Port Stainless Union Mounting Basic Bore 50mm Port thread Rc Stroke 350mm Auto switch Without auto switch Port size 1 4 Fluid Air Action Double acting Rod end male thread M18X1 Item # Description Spreading Capacity Throat Depth 212 1875 1964717 6" (15 cm) MD Bar Clamp Spreader 7 7 8" 13 3 8" (200 mm 340 mm) 3 3 16" (81 mm) 212 1884 1964718 12" (30 cm) MD Bar Clamp Spreader 7 7 8" 19 3 8" (200 mm 590 mm) 3 3 16" (81 mm) 212 1893 1964719 18" (45 cm) MD Bar Clamp Spreader 7 7 8" 25 3 8" (200 mm 645 mm) 3 3 16" (81 mm) 212 1909 1964720 24" (60 cm) MD Bar Clamp Spreader 7 7 8" 31 3 8" (200 mm 795 mm) 3 3 16" (81 mm) 212 1918 1964741 36" (91 cm) MD Bar Clamp Spreader 7 7 8" 43 3 8" (200 mm 1120mm) 3 3 16" (81 mm) This code specifies 63mm bore operating pressure 0