Up for sale is 25 pieces of a -030 AS568 size FDA Silicone o-rings with 70 Durometer hardness.Silicone supports a wide range of temperatures and has excellent resistance to weathering and ozone. The temperature range for this material is -65° to 390° F. Shipping via USPS First Class is included in the price.NOMINAL SIZEINSIDE DIAMETEROUTSIDE DIAMETERCROSS SECTION 1-5/8" 1-3/4" 1/16"Our Silicone O-rings meet or exceed the following ASTM D2000 Standard: ASTM D2000 M7GE705 A19, B37, EA14, EO16,EO36, F19 and FDA requirements in CFR 21, SECTION 177.2600Check our feedback and buy with confidence! We sell quality seals and gaskets and we back up everything we sell 100%.Payment for this item is by Paypal or Credit Card. Please contact us with any questions BEFORE buying. Download our o-ring size chart here: AS568 SizesViton is a registered trademark of DuPont Performance Elastomers.Powered by eCRATER . List your items fast and easy and manage your active items. jetgasket store On Sep-07-09 at 18:24:04 PDT, seller added the following information:1st Class USPS Postage includes a label and a tracking number. We never ship anything with just a stamp!