HuaJu Industrial HBS450 HBS450N woodworking bandsaws are 18 Inch band saws, but they have completely different appearances. The main difference between these 18 Inch band saws is HBS450N has two small windows that show the belt tension and blade running position. In addition, HBS450N has two 100mm dust extraction ports. In other words, HBS450 is a standard model. It has the same appearances as HBS500, HBS600, HBS700, and HBS810. Furthermore, the 18 Inch band saws have other model numbers in our factory that are MJ3445 and MJ345N.