HOPU 3688 Manual punch & plastic comb binding machine, max. punching ability 25 pages (80g)plastic cover two sheet,max. binding ability 450pages(50mm plastic comb), max. binding pages belowB5(360MM), margin control knob 2 - 5 mm, the most punch to count 24, margin distance and the form of hole 14.3mm3x8mm, ideal for small offices. the outside size 460x382x136mm, net weight 10.5kgs.