Box Level, Number of 30 Vials 0, Number of 45 Vials 0, Number of Level Vials 1, Number of Plumb Vials 2, Top Read Top Read Window, Vial Illumination None, Vial Material Acrylic, Vial Shape Block, Features Lifetime guarantee, Guaranteed accuracy, Patented Glo-View(R) Recharges the Vial Surrounds From Light Sources for Easy-Read In Low Light, Domed Level Vial Offers 320 Degrees Visibility, Rubberized Hand Grips, Reinforced Aerospace Aluminum Allow Frame, Removable GripTight(TM) End Caps