This Faithfull Prestige Professional Heavy-Duty Spirit Level has the following specification: Length: 120cm (48in) Section Size: 29mm x 68mm 3 Vials: 90°, 180° & 90° Accuracy: ± 0.5mm/m The Faithfull Prestige Professional Heavy-Duty Spirit Level is ideal for both DIY and professional use. The 3 large, easy-view vials are accurate to ± 0.5mm/m. The horizontal vial is dome-shaped to allow reading from any angle. The heavy-duty, aluminium section frame will not warp or twist and features wide 29mm double milled working faces for added accuracy. Sidewall thickness is 1.8mm with 3mm top and bottom faces for extra strength. It features a durable, black anodised finish and a comfort grip handle. Fitted with impact-proof, rubberised end caps that protect the level if dropped and reduce slippage on the measuring surface. Both end caps have hanging holes for easy storage.