Description Overview Zinser worsted ring spinning frames D type 450 504 spindles Pitch 82.5 mm Ring diameter 54 mm Tubes 260 mm Specifications Double apron drafting PK6000 With siro-lycra device Cowemat Overhead cleaner Inverter 380 V / 3 ph / 50 Hz Year of Manufacture 4 pieces year 2001 2 pieces year 1999 1 piece year 1998