A set of 5 (4 colors and 1 wide diffuser) plastic filters for your hot shoe flash. Not sure of the brand of these, they may fit some Vivitar or Sunpak flash units. The filters measure at 33/8" wide and 2" tall. Check your flash head to see if these would be useful. The colors are Red, Green, Yellow and Blue. The clear filter is a wide angle diffuser. Comes with case pictured.