GTG Multi-Needle Chain Stitch Sewing Machine Model GT-VC008-23032P/AT is an industrial sewing machine designed for sewing products made from chain stitch fabrics such as protective clothing, bags, shoes, etc. The machine features 21 chain stitch needles, a maximum sewing speed of 4500 revolutions per minute, a maximum stitch width of 4mm, and a maximum fabric thickness of 8mm.