Tier One 17mm Dovetail Rings Black 34mm Medium. The advanced manufacturing process reduces steps ensuring superior accuracy with no tolerance loss. These rings come with titanium hardware medium and high configurations and a mill-spec anodized finish. They fit directly onto existing 17mm dovetails and include an optional recoil arrestor pin with sizes available for 30mm-36mm tubes. Each set is supplied in a hard plastic case with the necessary Torx bits and has a built-in anti-cant bubble but they are not recommended for Magnum or high-recoil calibers. Specifications for Tier One 17mm Dovetail Rings: Manufacturer: Tier One Finish: Anodized Quantity: 1 Fabric/Material: Aluminum Condition: New Color: Black Package Contents: Tier One 17mm Dovetail Rings Nil Tier One T117D34M: 17mm Dovetail Rings Black 34mm Medium