Hello Hal, It was a pleasure talking with you this morning. I have attached two zygo measurements for the primary mirror. The first measurment covers the entire OD clear aperture. The second measurement covers the center area not seen in the first measurement. The center measurement includes the ID clear aperture. Please let me know if we should ship this mirror to L&L as soon as possible. I can have it shipped today. Thank you, Regards, Kevin Young Vice President, Operation Precision Asphere, LLC. 48860 Milmont Drive, Suite 105-C Fremont, CA 94538 Tel:510-668-1508; Fax:510-668-1595 Cell:416-722-3541 e-mail: kyoung@precisionasphere.com www.precisionasphere.com