Metric Radius & Angle Chart This Mylar Overlay displays both Radius & Angles on one chart. Increments per magnification are as follows... 10X Mag - 0.2mm increments 13.5" Diameter Mylar Overlay fits both Mitutoyo Optical Comparator models... PH-A14 PH-3515F This item is made to order, so the lead time for shipping is approximately 1 - 2 weeks after receipt of order.