Type Thickness Top Ring CP2 - Chrome Plated Parallel Faced Internally Stepped Top 2.38mm 2nd Ring P1 - Parallel Faced Plain 2.38mm 3rd Ring P1 - Parallel Faced Plain 2.38mm 4th Ring SS - Standard Slotted 4.76mm 5th Ring SS - Standard Slotted 4.76mm
Type Thickness Top Ring CP2 - Chrome Plated Parallel Faced Internally Stepped Top 2.38mm 2nd Ring P1 - Parallel Faced Plain 2.38mm 3rd Ring P1 - Parallel Faced Plain 2.38mm 4th Ring SS - Standard Slotted 4.76mm 5th Ring SS - Standard Slotted 4.76mm