4 x 8 Watt T5 UV Bulbs for 8W / 16W Fly KillersSuitable for most 8W / 16W Insect Killers / Bug Zappers including EazyZap, Flymatic, Vermatic, Prozap, Xterminate, PlusZap & many othersPeak UV Wavelength of 368nm - Optimal for Insect / Fly KillersLength: 290mm (Approx. 12 Inches). Diameter: 16mmBefore purchasing lamps, please make sure that your fly exterminator matches the wattage of our product specifications; It is recommended to replace the starter every time the lamp is replaced, and Parts using electronic ballasts do not need to be operated; When replacing, shaking the bulb to make a clicking sound is normal and does not affect the use effect" Note: Please allow slight errors due to manual measurement. Please make sure you don't mind before bidding. Color may vary depending on your monitor, please understand. Note: Hello, please pay attention to your shipping address when purchasing products. If your delivery information (e.g. name, street, house number, doorbell/email without name, etc.) is incorrect, the order will not be delivered correctly