The Johnson SM250 Level Vial is a precision level that allows you to set up and install equipment with ease. The clear acrylic construction of the level vial makes it easy to read and understand. It has an accuracy of 37 arc min, and comes in a pack of 10 units. It has 2 mounting holes that are 0.167 in. in diameter each, allowing for easy installation on almost any surface. The Johnson SM250 Level Vial is the tool you need for your next project.. This item has been restricted from sale in the following state (s): []