(Copied from the internet)
RARE, RARE, RARE! Perhaps one of the rarest and most unusual aftermarket shock absorbers ever produced and do not come up for sale very often. These Roto Flo shock absorbers were originally designed and manufactured in England after World War II as a direct replacement for the better known Houdaille shock absorbers. A limited number of these shocks found their way into the United States. The Spalding Brothers, as an example, used these Rotoflo shocks on one of their Dry Lakes modifieds. Roto-Flo shocks look equally cool when installed on a Hiboy, Lakes modified or a track roadster. It was common for early hot rodders to polish the bodies of the shocks and then lacquer them to prevent them from tarnishing. These shocks were produced in three different sizes: A1, A1-338 and A2/2. These are the lighter duty A1 models. Mounting holes are 85 centimeters apart center to center, shock arm is 7-1/2 inches long with center to center length of 6-1/2. The shock with the blue arm is NOS. Roto Flo shocks are pretty stiff and move in either direction through 360 degrees. They feel similar to what you would experience if you were to compress a non-gas filled tubular shock absorber by hand. Those who have used them are very happy with their dampening performance.
RARE, RARE, RARE! Perhaps one of the rarest and most unusual aftermarket shock absorbers ever produced and do not come up for sale very often. These Roto Flo shock absorbers were originally designed and manufactured in England after World War II as a direct replacement for the better known Houdaille shock absorbers. A limited number of these shocks found their way into the United States. The Spalding Brothers, as an example, used these Rotoflo shocks on one of their Dry Lakes modifieds. Roto-Flo shocks look equally cool when installed on a Hiboy, Lakes modified or a track roadster. It was common for early hot rodders to polish the bodies of the shocks and then lacquer them to prevent them from tarnishing. These shocks were produced in three different sizes: A1, A1-338 and A2/2. These are the lighter duty A1 models. Mounting holes are 85 centimeters apart center to center, shock arm is 7-1/2 inches long with center to center length of 6-1/2. The shock with the blue arm is NOS. Roto Flo shocks are pretty stiff and move in either direction through 360 degrees. They feel similar to what you would experience if you were to compress a non-gas filled tubular shock absorber by hand. Those who have used them are very happy with their dampening performance.