When it comes to plastic comb binding machines, its hard to go wrong with a machine from General Binding Corporation (GBC). Theyre one of the oldest and most respected office machine manufacturers in the country and theyre constantly coming up with new ideas. This commitment to innovation can be seen in one of their newest models, the binding machine, which offers an abundance of new features that havent been seen in a plastic comb binding machine before. This is a wonderful new device that should fulfill the binding needs of most small or medium-sized offices. The binding machine is capable of punching up to 25 sheets of 20 lb. paper at once, and it can bind booklets that are up to two inches thick (approximately 450 pages long). This machine has brand new auto-centering technology that can help save you time because you wont need to fiddle with the paper edge guide before you punch your paper it will be perfectly aligned every time you punch. And this machine also has a document separator that assists you in determining the right number of sheets you can punch. This is a great feature because itll help you punch as many sheets as possible per lift, but not so many that youll jam up the machine and then have to spend time cleaning up the mess. The C450e is very user-friendly and utilizes push-button technology for easy operation, plus you can use either plastic cMain Technical VariablesModel3D4DBinding Paper(max)450*270mm (min)160x120mm(max)450*270mm(min)160x120mmBinding Thickness3-50mm3-50mmBinding Speed1700pcs/hour2100pcs/hourPower15kw17kwOverall Dimesions3500*1520*1660mm3500*1520*1660mmWeight1600kg1800kgombs or GBC ZipBind spines, so you have a couple of different binding options.