Product Name: PY For Single and Twin Needle Special Machines with Upper and Lower RollerPY For Single and Twin Needle Special Machines with Upper and Lower Roller Application:Coverstitch , Single &Twin Needle MachinesDrive Mode:Upper & lower rollers drivingLift of the Presser Foot:Manual operation , automaticElectric Voltage:AC110VAC220V/AC380VTransmission Specification & Choice:Factory default : P-2 thin & medium materialChoice : P-1 thick materialRollers Specification & Choice:Factory default :upper roller D55*50 lower roller D25*80 ( Polyurethane )Choice : upper roller D55*50 lower rollerD25*80 ( Iron ) Choice : upper roller D55*35 lower rollerD25*60 ( Polyurethane ) Install Form:AFloated mounted on the tableBSubmerged mounted on the table (for submerged)Usage:Improve efficiency , improve quality , save labor , prevent the wrinkle of the materialScope of Application:Home textile heavy-duty materialContact: sales1(at)nbsyjx(dot)com