High Qualitys Materials】Semi-enclosed structure, with a certain degree of dust-proof acity; shell made of aluminum alloy die-casting, the main components of high-quality alloy steel support. For Most Bags】This fast, heavy-duty hand-held closer works with virtually all bag substrates including paper (single/multi-wall), woven polypropylene, laminated woven polypropylene, net, PE , burlap and cotton bags in agricultural, food, pet, animals . Powerful Working Efficiency】90-130w, 250 – 300 bags/hour(speed: 1250 rpm); Thickness of sewing materials: 8mm (0.31in); space between stitches: 6.5mm (0.26in). Portable and East to Use】Light weight(about 7kg). Extremely easy to operate can be used with 1 hand, safe plastic handle, come with a sewing thread.