Hollow cutter retrofit kit Easily retrofits your existing milling spindle to suction milling of foamed plastics including styrofoam and polyurethane Designed for suction milling of foamed plastics including styrofoam and polyurethane Ideally suited for joint application with hollow cutters and suction machines Customised system complying with the properties and dimensions of your milling spindle Easily specify the properties/dimensions of your milling spindle using a standardised form.