Type Dimension(mm) d s r a≈ d1 H PM41005F 10 3.5 0.5 2.4 4.2 10 PM41005FL PM41305F 13 4.5 0.5 3.4 5.2 13 PM41305FL PM41605F 16 5.5 0.5 4.4 6.2 16 PM41605FL PM41905F 19 7 0.5 5.4 7.2 19 PM41905FL