Max. Punch : 28 sheet (70-80g A4 paper) Max.Bind : 500 sheets (51 mm comb ring) Paper size : A3,F4,A4,A5,B5,etc. Paper margin : 2.5mm/4.5mm/6.5mm Hole size : 3*8mm rectangle hole Hole distance : 14.3mm Hole quantity : 21 holes Machine size : 410*370*260mm Carton size : 510*470*340mm N.W./G.W. : 17kgs/19kgs