Ceiling mount light bulb 125v Socket with on/off pulling chain switch PRODUCT OVERVIEW: Complete your remodel or replace an old ceiling unit with the Medium Base Lamp holder. The medium based lamp holder is easily installed on a 3-1/4" or 4" electrical box and features a short pull chain for conveniently turning your light on and off. It is great for matching any home's decor and is a perfect addition to any home remodel. NOTE: If you are unsure or uncomfortable about performing this installation, please consult a qualified electrician. Medium base For use with 3-1/4 in. or 4 in. box only Includes short pull chain 125V Dimensions: Product Depth (in.) 2.66 Product Width (in.) 4.64 Product Height (in.) 5.69 Thanks for your happy bidding & being with us.