Spirit Levels & Angle Measurers Uta

Features: Fit for 21mm weaver-picatinny rail mount dovetail rail mount. With hex-key,accurate made. Small size allows for convenient storage and transport. Eliminate canting and improve long-range accuracy with these bolt on scope mounted spirit levels. High quality materials, exquisite technology, fine workmanship, better impact / more durable. These bolts are mounted on the horizontal-surface of the oscilloscope installation to eliminate tilt and misalignment. Specifications: Material:Aluminum Alloy Size:As Picture Shown Type: Cylindrical level(Without wrench) Compatible with 20mm rail Color: black shells + green-liquid Note: 1.Please allow 1-2cm errors due to manual measurement, make …