Tree Bicycle Co. H10 headset cap in silver. Step keyed for 6mm and 1/4" allen keys. 7075 aluminum. Threads and top cap in great shape.  FBM Chopper forks came w/ their own fork cap w/ different threading so I never ended up needing this.  Works on the freestyle starnut, S&M (not the OG big bolt), Fit, and Standard forks.  Ask any and all questions before hitting the buy now button.