Features: Single bubble High quality PMMA Scratch free High optical clarity material Precision machined internal radius Black lines, internally fitted gives minimal parallax errors These level vials are for ideal for adding to all stationary equipment that can be leveled, such as stoves, refrigerators, washing machines, milling equipment, refrigeration equipment, heat pumps, furnaces, air handlers, campers and any tool, device or object where level is important. Add one to many of your hand tools to know when you are working at level. These level vials are more durable than most OEM level vials built into hand tools, they are made thicker and for stronger. Specifications: Material: PMMA Liquid Color: Green/Blue Color of Division Line: Black Size: 10x10x29mm/0.39x0.39x1.14" Quantity: 5 Pcs/1 Set Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! No Retail Package Package Contents: 5 x Bubble Spirit Level