The C.K Aluminium Box level range is ideal for use by builders, electricians, plumbers and DIY enthuasists, ensuring you get precise balance no matter what your application is. The CK T3494 range is highly accurate at 0.057° (1mm per 1m) in overhead and normal measuring position. Its made from box section aluminium, powder coated, strong, light & durable for use in demanding environments. The Barrel shaped vials are guaranteed leak-proof for 3 years and made from clear solid Plexiglass are virtually unbreakable and shockproof. Horizontal vial is luminous making it ideal for low light conditions. The T3494 range includes 16"(400m) & 24"(600mm) which feature 1 vertical & 1 horizontal vial: 32"(800mm) and above feature 2 vertical & 1 horizontal vials. Guaranteed for life for imperfect materials or workmanship from the manufacture, Carl Kammerling International Some other products which go perfectly with this Pocket Level: C.K Magma Hand Tool Roll bag.