It is a Schwinn chrome back 4 reflector rack and correct seat post clamp for a boys or girls 26 inch bike. This is the earlier rack with the arched up back ends...
Not the later flat ends. It is probably correct for a late 1950's to early 1960's bike. This one came off of a 1963 Corvette. It will work on many models of boys or girls 26 inch bikes. One of the reflectors has a crack on the top of it but it is still very tight and will not spin. It has nicks, dents, wear scars, scratches and pitting spots with chrome loss. There is probably some rust where the parts are welded together.Overall an average condition rack for your 26 inch bike. The item in the pictures is the item you will receive. Please look closely at the pictures as they are part of the description.