You are looking at a brand new, still in package Pro-tek 43mm Fork Tube Clamp (Pro-tek Part No. PRO-FTC-43).
Clamps can be used for steering dampers, passing lamps or custom applications.
This 43mm fork tube clamp is CNC manufactured in the US out of 6061-T6 billet aluminum and then clear-coat anodized for corrosion resistance.
It is a two piece design that comes with stainless steel bolts for easy bolt-on assembly.
There are two 8mm threaded damper holes on the clamp for easy damper adjustments.
The retail price for this clamp is $36.
This is a Fork Tube clamp manufactured by Pro-tek - a leading manufacturer in the motorcycle industry since 1994. It is made here, not in China like most of the cast or molded things you see on the internet.