Feature●Fits for Cylinder Bore: PT 3/8" /80mm●Inner size(I.D): Dia. 67mm/2.6●Overall size(O.D): Dia. 80mm/3.15●Thickness: 5mm/0.2; Weight:80g;●Package: 3 x Magnetic Ring;Description Baomain Magnetic Ring for Pneumatic Air Cylinder SC 80 Bore: 8/3 inch(80mm) ,Magnetic Piston Cylinder Accessories