This selection of knobs, switches, caps and buttons are moulded in black, high temperature, phenolic material. These are used on cookers, the London Underground, and other testing environments. Contact Cromwell for all of your demanding moulded component requirements. Click on the product name, Knobs & Switches Range, to see two picture with 10 samples and a close up of cooker knob, handle & screw plug. Double click on the pictures to enlarge.