Ck spirit level box section 400mm ck tools t3494 40 a strong light and durable spirit level made from powder coated box section aluminium featuring virtually unbreakable vials guaranteed leakproof for three years a luminous horizontal vial for low light conditions high accuracy shockproof construction 05mm per metre metric measurement graduations for convenience 2 vertical and 1 horizontal vials and a hanging hole for storage ck tools t3494 40 spirit level box section 1000m