High productivity, uniform and beautiful finish. Complete Cylinder Bed Overlock Machine with Variable Top Feeder for sewing circular material. The well-reputed AZF8400 type complete cylinder bed overlock machine with variable top feeder. There is no obstruction at all under and rear of cylinder be so sewing tubular garment is smooth. Combined with RS25 device, it promises stable quality in the production of cuffs, neck & waist of T-shirts or sweat shirts - especially suitable for attaching collar. Variable Top Feeder for Quality Enhancement without Plyshifts. The main advantage is that the top feeder is designed to draw complete ellipse just as bottom feeder does. It eliminates damages on light or delicate fabrics, without plyshifts even on all fabrics hard to feed. Also, curved sewing operations can be easily done.