Features: Precisions machined internal Length . Black lining , internally fitting gives minimal errors. These level vials for ideal for adding to all stationaries equipment that can be leveled, such as stove , 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 tool to know working at level. These level vials more than most level vials build into hand tool , they Produced thicker and for strong . Specifications: Material: PMMA Liquid Color: /Blue Size: 10x10x29mm/0.39x0.39x1.14" Package Includes: 5 x Bubble Level note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.