Globe Electric's 4" Flush Round Trim Recessed Lighting Kit with tempered frosted glass and brushed nickel finish is the perfect way to brighten up the interior of your home or commerce with style. The frosted glass emits an indirect glow perfect for bright mood lighting. Completely dimmable with a compatible dimmer switch to set the perfect mood and ambiance. Featuring patented PUSH-N-CLICK clips to grip uneven holds and surfaces installation is tool-free and easy. Fast and easy to install, this kit is sure to save you time and money. Requires one 35-watt halogen or 7-watt LED GU10 bi-pin base MR16 bulb (sold separately). Dimmable with a compatible dimmer switch (not included). Cut a 3.88-inch hole for this item. Actual decorative trim size is 4.56-inches..