Used mercury vapor lamps, 5 pieces HF400X Removed to convert the warehouse to LED lighting. They were working normally until just before removal. Please understand that these are used items. The shapes are a mix of protruding and round types. Manufacturers are also mixed. Usage frequency is unknown. No instruction manual or original box. We are not responsible for any issues during shipping (including damage). Sold in units of 5. We have stock available, so please inquire. Photos are for illustrative purposes only. If you leave a comment, we will upload photos of the actual items we will send. Returns and exchanges are not accepted. Lamp manufacturers: National x 1 HITACHI x 1 Iwasaki x 3