Vortex Precision Diving Board Mount, 30mm Picatinny mount Perfect for adding Vortex Impact 4000 Ballistic Rail-Mounted Laser Rangefinder, red dots, and other accessories Compatible with Vortex Precision Matched Rings and Precision Extended Cantilever Mounts 30mm tube size Height: 1.36" Weight: 2.1oz Includes mount, four T-25 Torx screws, and T-25 Torx wrench VIP Lifetime Warranty Please Note: Not compatible with the Vortex Precision Quick-Release Cantilever Mount