This may seem like a silly question but just would like to get some clarifaction. I have a set of likely 80' Cenilli bars that I have put up for sale Model 65-38. I'm unclear as to the actual bar size when I measure them they measure about 40mm outside end to end on the bars which I would consider 40mm yet the Cenilli model number indicates that they are 38mm. I'm just interested as to how Cenilli defines these as 38's.