Stanley 42 480 I Beam Level & Plumb, I Beam, 2, Plain, Top Read Window, 48 in Overall Lg, Acrylic 3DXF2 Gripping Surfaces With Teeth Hardness Gripping Surfaces With Teeth Hardness Approximately 61 Hrc Open Deck Wood General Purpose Dolly Number of 45 Vials 0 Shock Absorbing End Caps Hold Up to Heavy Use Magnetic Nonmagnetic Nonmagnetic Top Read Top Read Window Number of 45 Degree Vials 0 Number of Level Vials 1 Number of Plumb Vials 2 Frame Material Aluminum Vial Type Bubble Item I Beam Level Number of V Grooves 0 Number of Magnets 0 Vial Material Acrylic Number of 30 Degree Vials 0 Total Number of Vials 3 Lighted Vials No Number of 45 Vials 0 Number of 30 Vials 0 Accuracy Standard 0