These Bubble level are more durable than most OEM level vials built into hand tools they are made thicker and stronger. The Bubble Level can be used for heat pumps, stoves, refrigerators,3D printer,Photo frame, air handlers,washing machines, milling equipment,refrigeration equipment, campers and any tool,adjusting stereo turntables, record player. device or object measure. Specifications : - Weight : 80g (2.82 ounce) - Size : Φ60mm*12mm (Φ2.36 inches*0.47 inches) - Color : Green Water and silver Case - Case Material : Aluminium+Glass - Accuracy(Sensitivity) : 15′/2mm (0.25 degree/0.079 inches) - Package Included : 1Pcs Circular Bulleye RV bubble level Usage Method: Put the bubble spirit level onto the surface you want to measure, the middle position of bubble inside the spirit level will show that the surface is level. Bubble level has a wide application available for all high accuracy requirement areas, makes adjusting more convenient. Bubble level can be professional layout measuring and normal usage.