Aluminum I-Beam Level, 48 in Length, Nonmagnetic, Top Read: Yes/ DESIGN TYPE: DOUBLE FACE OVERALL OUTSIDE DIMENSIONS: 48 IN. LG VIAL QUANTITY: 1 LEVEL VIAL QUANTITY: 2 PLUMB VIAL ARRANGEMENT: SINGLE LEVEL VIAL ARRANGEMENT: SINGLE PLUMB VIAL GRADUATIONS: NOT INCLUDED LEVEL VIAL GRADUATIONS: NOT INCLUDED PLUMB VIAL SURFACE FINISH: UNGROUND LEVEL VIAL SURFACE FINISH: UNGROUND PLUMB SPECIAL FEATURES: I-BEAM TYPE MATERIAL: ALUMINUM