Spirit Level Bubble Vial Our company specialized in the research and manufacturing and sale of level vial with advanced facilities and rich experience. There are three hundred kinds of products in our company including: 1) glass spirit level vial 2) metal body level component 3) metal circular level 4) electronic vial 5) plastic spirit level vial 6) High precision glass vials 7) curved glass spirit level vial 8) sensor level 9) special spirit level The sensitivity is from 60²/2mm to 2" /2mm. Our products have been used widely in optical and electronic instrument such as theodolite, level, compass level, electronic scale, total station and etc .