Features The JOHNSON HD I-beam level with Multi-Pitch® measures slope from level to 1/2" per foot pitch in 1/8" increments. Strong holding magnetic edge holds to ferrous metal surfaces. Top-read window maximizes readability with durable easy-to-read acrylic vials. Shock-absorbing end caps protect frame. Frame Material / Aluminum Length / 24 in Magnetic/Nonmagnetic / Magnetic Top Read / Yes Total Number of Vials / 3 Number of Plumb Vials / 2 Number of Level Vials / 1 Number of 30 Degree Vials / 0 Number of 45 Degree Vials / 0 Lighted Vials / No Number of V-Grooves / 0 Accuracy / 0.014 in/1 in Vial Type / Barrel Vial Material / Acrylic Number of Magnets / 1 Magnet Type / Strip Color / Brown Features / Multi-Pitch, Shows Slope in 1/8 in Increments Includes / Shock Absorbing End Caps Protect Frame