Description Overview Inventory number: E-9393 Zinser ring frames for sale Model 321S Year of construction: 1991 712 spindles Ring diameter: 52 Gauge: 82.5 Tube: 260 mm Covemat autodoffing Amsler slub device Quantity: 4 Model 3210 Year of construction: 1989 712 spindles Ring diameter: 52 Gauge: 82.5 Tube: 260 mm Covemat autodoffing Amsler slub device Quantity: 4 Model 321E Year of construction: 1992 660 spindles Ring diameter: 60 Gauge: 90 Tube: 280 mm Covemat autodoffing Amsler slub device Quantity: 4 Model 321E1 Year of construction: 1994 660 spindles Ring diameter: 60 Gauge: 90 Tube: 280 mm Covemat autodoffing Amsler slub device Quantity: 4