Description Overview Ratti model R 321 two-for-one ring twisting machines Year: 1985 Designed for synthetics and artificial filament yarns Specifications Number of spindles: 100 per frame Pot diameter: 5 inches (12.70 cm) Production rates: 50 meters per minute maximum, depending on denier and twist level Type of yarns produced and range of deniers: 20 denier up to 500 denier Dimensions Length: 14000 mm Width: 800 mm Height: 2000 mm