... canvas, container bags, belts, leather, tent, luggage, etc. Model GB4-1 is High speed, Single Needle, Compound Feed with alternating presser ... lockstitch machine. As a heavy duty lockstitch sewing machine, GB4-1 model is used to sew canvas, container bags, belts, leather ... : 78kgNeed bar stroke: 58mmShuttle hook: SEIKO HSH-7-3 GB4-1 Container bag sewing machine