Diameter Spacer tubes Outside 0.197 in (5 mm) 0.197 in (5 mm) 0.236 in (6 mm) 0.236 in (6 mm) 0.315 in (8 mm) 0.394 in (10 mm) Inside 0.098 in (2.5 mm) 0.118 in (3 mm) 0.138 in (3.5 mm) 0.157 in (4 mm) 0.197 in (5 mm) 0.236 in (6 mm) (See SN 60310 as well)
