15N6304 up for sale is a set of 3 new copper sealing gaskets used on the XMMH X501 uni-Mog , these have a od of 0.797 just over 3/4 x 0.369 x 0.058 wide, used as injector cartridge gaskets , this fits a few models of mercedes diesel engines see photos for parts list this is part number 125 on exploded diagram , see photos for more information,