OX Trade 4 Piece Level Set - 600, 1200 1800mm Trade Level and Trade 230mm Torpedo Level The OX Trade 4 Piece Level Set provides a versatile range of sizes to cover all requirements. The set includes a 600mm, 1200mm and 1800mm levels as well as a useful 230mm Torpedo Level for those small hard to access levelling jobs. FEATURES OX Trade 4 Piece Level Set - 600, 1200 1800mm Trade Level and Trade 230mm Torpedo Level Trade Aluminium Levels have 3 solid acrylic UV resistant vials with accuracy of .5mm/m or .5in/in Torpdo level has Magnetic V-groove for pipe work and scaffolding.