Type Dimension(mm) d s r H PM410050 10.5 3.5 0.5 10.5 PM410050-1 10.5 3.8 0.5 10.5 PM413050 13.5 4.8 0.5 13.5 PM416050 16.5 4.8 0.5 16.5 PM419100 19.6 5.8 1 19.6