This listing is for a new Lutron D-600R-WH 600 Watt Single Pole Rotary Dimmer Switch.  A White Knob is included.  This dimmer switch is UL listed, and is designed for use with incandescent and halogen lamps.

Your satisfaction is guaranteed.  All items are shipped via the US Post Office (USPS).  I make every effort to ship your item within 24 hours following receipt of payment, except for Sundays or Holidays when the post office is closed.  Payments are accepted by Paypal.