Description Overview Rieter open-end spinning frames Type: R20 Quantity: 3 machines Specifications Year 2000: 1 machine with 280 rotors Year 2002: 2 machines with 300 rotors Rotor diameter: 32 mm Rotor type: S-B Z51 Opening rollers: OB 20 D 2 degree conical cones Equipment 2 piecers Uster Quantum iMK C20 clearers Waxing