Deli Digital Protractor Angle Finder Inclinometer Electronic Measurement Level Angle Slope Test Ruler Length 300mm Three StylesDescription 1. Product name: die cast aluminum spirit level 2. Solid cast aluminum ruler body design, thickness greater than 3mm, to ensure high strength, solidity and durability, ruler length: 300 mm, aluminum ruler body, surface painting, measuring surface milling, 2 horizontal bubbles, bottom with magnet, Deli quality 3. Blue anti seismic horizontal bubble design, blue anti vibration, anti ultraviolet horizontal bubble design, inner wall finishing,