Feature: High optical clarity material Precision machined internal radius No glue or adhesive is included Black lines, internally fitted gives minimal parallax errors Useful for hanging anything, cute, and highly recommended Hang wall frames and art displays like a pro with this mini-level . Introduction: Material: Plastic Single Bubble Size: 4 x 1 for cm/1.6" x 0.4" Weight: 28g(10pcs) Color: Fluorescent Green Type: Cylinder Bubble Level Color of division line: Black Liquid Color: Fluorescent Green Please Note: 1. The item does not include other accessories ! 2. We have try our best to show you the real color, but due to the difference between different monitors, there will be a little difference in color. Your kindly understanding will be appreciated ! Package List: 10 x Cylinder Bubble Level.