Check the listing for details. 34mm Scope Leveling Kit: 34mm Bubble Level+Rail Mount Level+Circular level. Condition: New. Listed at 39.99 USD. Eliminate canting and improve long-range accuracyScope-mounted bubble level fits 34mm riflescope tube.Picatinny rail mount level fits a scope installed on Picatinny/Dovetail rail.1.3x0.34 Inch horizontal bubble level precision bulls-eye circular bubble level for professional measuring.Package includes: 1x 34mm tube bubble level; 1x Picatinny Rail Mount Level; 1x Bullseye Circular Bubble LevelHigh quality aluminum alloy in durable black matte finish.Whenever you are doing some precision long-range shooting or shooting with your airgun, the ApexHorizon scope bubble level will ensure your rifle is perfectly vertical. It really makes a difference and improves your accuracy.It's full CNC machined with T6061 but not using the aluminum alloy sections