Compatible replacement output module fan for the Marshall MG100DFX, MG100HDFX, MG50DFX, and MG250DFX among many other models. Depending on which connector your amp uses you may need to splice the new fan to the original connector.
NOTE: this fan is a replacement for the 2 x 2 x 3/8″ original fan. Some amps used a larger fan which this is not compatible with.