Features: 100% brand new and High quality aftermarket shaft sleeve adapter, Made of Aluminum Alloy; Tip size: .370; Compatible with Titleist 816 818 917 915 TS1 TS2 TS3 TSi2 TSi3 hybrid; It is with serial number; Package List: 1pc golf shaft sleeve adapter; If any question about our product, please feel free to contact us. We will reply you within 24 hours.