Incredible tool for physical laboratory equipment or as a decoration in your laboratory more efficient to make learning of physical experiments .. ?This press model is used for pphysics experiments in middle school, to explain the structure and principle of the press .. ?This instrument is divided into two types, with and without pressure gauge. There are three parts: small block, big block, pressure gauge or angle ball valve .. ?The instrument should be handled with care, do not collide and stored after use in a cool, dry place .. ?Good for education tools, learning displays and collectibles, is also a great addition to your laboratory supplies.