This is professional and practical spirit level, mainly made of plastic materials, safe and durable, with excellent texture. It has reasonable design structure, is easy to operate, and is convenient to use. It can help you locate and measure, and help you hangs the photo frame better. This is very good household gadget and will serve you well. Features - Material: Plastic. - Size: 28.60X5.90X2.00cm/11.24X2.32X0.79 inch. - Battery type: AAA battery (without battery). - Measuring range: 0-90°. - Accuracy: ±0.1°. - Resolution: 0.05°. - It is made of plastic materials, which is durable and has . - It is widely used in pictures, posters, digital paintings, cross stitch, photo frames, etc. It is excellent home measurement positioning tool. - Small and , easy to carry, easy to use, convenient for you to operate at any time. - It is made with craftsmanship, has practical functions and durable texture, it will be your good choice. - Good sensitivity, strong operability, professional and durable, will be your good choice. Package list: 1 x Level Ruler