CAT 3304 4 CYL. with e.i. fe-332 2 stage 5 1/2 x 3 1/2. murhpy panel. been sitting from fleet for 4 yrs. 3304 will need rebuilt it was using oil. compressor rod packing needs replaced. compressor selling gas fine. but it will need to be checked due to sitting & not in service. call with any ? serious. make an offer getting out & retiring from patch.