This is a set new modern high quality replacement gaskets. They are nice and thick.  These are the front and rear diff cover plate gaskets. This particular set is for the M38, M38A1, and M170.  This set consists of a front gasket for the Dana  25,27, and 30 plus the rear Dana 44. This set will fit the CJ2A, CJ3A, and CJ3B with the Dana 44.  

 Note: For the CJ2A, CJ3A, and CJ3B please check your rear axle to make Sure it is a Dana 44. The civilian jeeps came with two options of rear axles. One being the Dana 44 and the other more common Dana 41.  This set will not fit the Dana 41 rear axle.