Walter Stern Shallow Form Watch Glasses. When the condensed optical surfaces of a watch are exposed to strong magnetic fields for example during vibration testing the stresses on the glass surface of the watch crystal are reduced to an extremely low stress. During vibration testing the stresses on the glass surface are reduced to an extremely low stress. Walter Stern Inc. reserves the right to determine acceptable samples for breakage analysis. The watch glasses are supplied without a certificate of analysis. Chemical stability has not been demonstrated. Specifications for Walter Stern Shallow Form Watch Glasses 110-110 : Diameter mm (in.): 150 (6) Unit: Pack of 12 (Please note that the description and stock photo may not correspond to the specific model listed above) We offer only genuine Walter Stern products authorized for sale in the U.S. and other markets so you can be sure that you are buying authentic Beakers Test Tubes Flasks & Accessories with a full manufacturer's warranty in addition to our own 100percent Satisfaction Guarantee. We are your premier online distributor for Walter Stern Beakers Test Tubes Flasks & Accessories. We are an authorized supplier to all federal and state government agencies as well as to research and educational institutions and can facilitate volume orders on many types of laboratory equipment lab consumables and other products to help fulfill your specific needs. We offer Free Shipping and FREE USPS shipping to APO and FPO addresses on all orders in our store over 49. Please refer to our APO/FPO Shipping and Export Restrictions for more information on export to APO/FPO addresses. In addition to the Walter Stern Shallow Form Watch Glasses 110-110/ 66112-209 we carry a full complement of Beakers Test Tubes Flasks & Accessories as well as other product offerings from Walter Stern. We also carry a full line of Walter Stern accessories to help meet your laboratory and scientific needs. For a complete selection of Walter Stern Beakers Test Tubes Flasks & Accessories please visit our Walter Stern page. For more brand name Beakers Test Tubes Flasks & Accessories please visit our Beakers Test Tubes Flasks & Accessories store section. To see our complete line of lab medical industrial and scientific products please see our science and lab equipment online catalog. Walter Stern Shallow Form Watch Glasses 110-110