Check the listing for details. 10 pcs. 15/64 Hole 9/16" OD Belleville Compression spring Washers concave convex. Condition: New – Open box. Listed at 6.85 USD. Item .................... Qty. 10 pieces per bid even though there are 11 in the photo Small Tempered Hard tension WashersManufacturer ...... Original Schnorr Co. Disc Springs Made in Germany metric ID ........................ 6.27mm diameter hole which is .247" almost 1/4" just a hair over 15/64" OD ...................... 14.85mm outside dia hole which is .584" just over 9/16 and just a hair over 37/64"Thickness ............ .64mm which is about .025"Height ................ 1.12mm which is .044" Condition .......... NEW old stockI do not have the original mfg packaging with these. This is not an actual photo but these are pretty much identical to the one in the photo, I have had a few of them in the past that were pretty much all the same so I have used this same photo for each one.