FATMAX® Box Level | Sta143524 MaxEdge™ bridged center vial Aluminum box-beam structure Shock-absorbing end caps Non-magnetic Size: 600 x 30 mm Stanley Fatmax Spirit Level 3 Vial 60Cm | Sta143524 The FATMAX® Box Level provides vials provide maximum accuracy of 0.0005 in./in. (0.5mm/m). It has a MaxEdge™ bridged center vial for continuous marking surface and durability and a shock-absorbing end caps hold up to heavy use. The single-piece, aluminum box-beam structure provides durability and accuracy whilst the non-marring side bumpers helps prevent damage to finished surfaces.