Lots of info here on those. Cheap Chinese junk that need work to make them work correctly. Clevis is too wide for the application and without using spacers to take up the slack unsuspecting users will snap the ears off the clevis. That is the last set being offered by that seller in China. They claim direct replacement for everything from CB750 down to 150cc bikes. Last time I checked I wouldn't want a shock sprung for a 750 on a 150 that weighs less than half or vise versa. They are the same as the RFY shock with another label slapped on them. There is another shock being discussed and evaluated right now from TEC Bike Parts that looks to be better quality and more thought into spring rate for your particular application, but they also are made in China even though their website says they make all their product on their UK website.
