Level Case Overall Length 48 in Accessory Type Level Case Overall Height 1 1/4 in Overall Width 2 1/2 in Compatible with Grainger Part Number 21CK32 43Y56 43Y576 6A509 Compatible with Level Type Box Levels Digital Levels I-Beam Levels Vial Levels Material Styrene Color Black Yellow Compatible with Manufacturer Model Number SL12AB48 SL2048 SL22BY48 SL44SB48 SL4848 SLAL48 SLDIG48 SLHD48 SLMA48 SLPL348 SLPML48 SLQML48 SLSC3648 SLTMI-48 SLWML48