40MP-U600 Dixon Valve 6" Buna-N Sanitary Clamp Gasket - Black - Pack of 50Features: Color Code: No dot for 1 2" and 3 4". Red dot for 1" 8" Meets 21CFR 177. 2600 Passed U. S. P. Class VI Cytotoxicity testing. Peroxide cured. Gasket material approved by (3A), USDA. PSI Service Ratings for the sanitary clamps DO NOT APPLY to connections (1" and above) using any PTFE gaskets, due to the potential for cold flow under normal operating conditions. PTFE gaskets, when used with any clamp, are likely to leak at pressures far below