Hawke Sport Optics Bubble Level for Rifle Scopes 9-11mm Black. This Hawke Optics rifle scope accessory is a simple bubble level that mounts to your firearm's dovetail for evaluating the level of your Rifle Scope at a glance. The Hawke Optics Rifle Scope Bubble Level ensures that the bore of your rifle and the reticle of your scope are in perfect alignment at all times. For a simple convenient Rifle Scope accessory that will shave time off of your zeroing process choose the Hawke Dovetail Rifle Scope Bubble Level Tool. Specifications for Hawke Sport Optics Bubble Level for Rifle Scopes: Manufacturer: Hawke Sport Optics Color: Black Finish: Anodized Fabric/Material: Aluminum Gun Type: Rifle Gun Make: Universal Gun Model: Universal Condition: New Features of Hawke Sport Optics Bubble Level for Rifle Scopes Bubble level - 9-11mm/Weaver Package Contents: Hawke Sport Optics Bubble Level for Rifle Scopes Hawke Sport Optics 64100: Bubble Level for Rifle Scopes 9-11mm Black