Specifications: 1. This postbed sewing machine is equipped with large hook &overturn post cap, which can sew very thick thread. Specially suitable for sewing boots, army shoes and some other heavy duty leather. 2. It is our own-developed products in china. The sticthing trace of this products can be compare with roller-feed machine. Hence it is well-acceted by customers. BMA-810/820 Round Body BMA-810F/820F Square Body BMA-810L Large Hook Applications: Suitable for shoes, bgas, caps,and other genral leather works Machine Details: ModelSpeed(SPM)NeedleStitch LengthPresser HeightNeedle Bar StrokeNeedle GuageBMA-8102200#14 21 5MM 7-11MM 36MM1/16″ 3/32″BMA-8201800#14 21 4MM 7-11MM 36MM1/16″ 3/32″BMA-810L2200#14 21 5MM 7-11MM 36MM1/16″ 3/32″BMA-820L1800#14 21 4MM 7-11MM 36MM1/16″ 3/32″