RING; INTERNAL DIAMETER: 65 MM; OUTER DIAMETER: 75 MM; THICKNESS: 10 MM MATERIAL STANDARD: SAE 4140TR STEEL; SHAFT TYPE: ARROW; PLAN NUMBER O: 0107055-91.032; DISTANCE FOR TRANSPORT CAGE. CONSIDER DISTANCE "L1" AS 23 MM. MANUFACTURING MATERIAL SAE 4140TR STEEL