1,YT180 leather sewing machine 2,chain stitch:12mm 3,sewing alibity:22mm 4 ... 800r/minYT180 is single needle, compound feed walking foot sewing machine is ideal for sewing leather, canvas, synthetics and other ... and bottom feed), the GB6-180 can easily sew heavy materials with heavier thread.Speed of sewing800s/minShape of head736 ... space200*420mmTravel of needle pole YT180 leather sewing machine