Unbranded 2" Pneumatic Cylinder. the holes in the end of the cylinder are 1/2-13 threads the cylinder seemed to work ok but I did feel a slight bit of blow by the stroke it about 2-1/4" the bore I am not sure, but the OD of the cylinder is 3-1/2" so the bore is probably around 3" depending on cylinder wall thickness. 

This is surplus to a now closed factory that kept spare parts on the shelf the boxes/parts may show shelf wear and have dust on them.

[Please Look at all the pictures they are part of the description] 

                                                                                               [B1-F1-R6-S2-2]