This is an Aftermarket Fisher Lift Cylinder 1-1/2" X 6". 

Bore x Stroke: 1-1/2" X 6"

Acting: Single

Retracted: 13-1/4"

Extended: 19-1/4"

Ram Dia: 1-1/2"

Base Dia: 1-3/4"

Pin Size: 1"

Port Type: # 6 SAE

Port Location to Pin: Inline

Alternate Part Numbers: 56718, F56718, 1304311