MO-14-20 Mylar OverlayRadius & Angle Chart This Mylar Overlay displays both Radius & Angles on one chart. Increments per magnification are as follows 10X Mag . 010" increments 20X Mag . 005" increments 50X Mag . 002" increments 100X Mag . 001" increments 13. 5" Diameter Mylar Overlay fits both Mitutoyo Optical Comparator models PH A14 PH 3515F This item is made to order. The lead time for shipping is approximately 3 4 weeks after receipt of order. Please indicate your Lens