1, b serials have longer strokes for multi-layer materials. 2, high efficient, high precision, labor saving. 3, auto-balance structure, more durable. toys, puzzles, Grinding wheels, electronic, automotiveinteriors, bras, epe packaging, sponges, platics(box, film), thermoforming, gloves, balls, carpets, gaskets, balls, medical accessories, labels, Garment, silkcot, shoes sole, lunch box, leather goods(shoes, bags, luggages, belts), sheets, hardboards, etc. Standard export wooden case with plastic film or as customer's request