Stanley fatmax spirit levels 3 vial stanley 1 43 536, these stanley fatmax™ heavy duty box levels are machine milled on two sides to ensure accuracy, and have improved vial views for ease of use'. '.strtoupper('t')he large centre vial is bridged to allow a continuous line to be marked on the work piece'. '.strtoupper('t')he dual bi material grips are ideal for carrying and vertical levelling, and the levels have shock absorbing end caps for longer life.faxmax levels have an accuracy of ±0.5mm m on one face and ± 0.7mm m on the other, which is covered under a 5 year accuracy guarantee.the levels in this range are 6mm taller than most competitors, 6 9mm wider than other levels and are heaviest in their class, providing ultimate strength and durability.the stanley sta 1 43 536 fatmax level is 900mm 36 inches in length'. '.strtoupper('s')tanley 1 43 536 fatmax spirit level 3 vial 90cm