[Length & Length Package] Length: 330mm / 13.1 inches. Diameter: 25mm. Sold in sets of 2 bulbs.</p> [Powerful Insect Control]The tube emits a wavelength of 365 Nm, which effectively attracts flies, mosquitoes and other flying insects.</p> [Safe and Chemical -Free] Non-toxic, odorless and chemical-free, and it is 100% environmentally friendly and safe for babies and pets. The device is CE and RoHS certified.</p> [Applicable Model]Applicable to most 20W electric fly swatter / mosquito repellent / fly swatter lamps. Note: Please make sure the length and specifications of your old lamp match ours.</p> [After-sales service assured]High-quality fraxinus tube, guaranteed for 12 months.</p > Fraxinus is a quality manufacturer specializing in electric fly swatters and lighting equipment. We are committed to providing customers with safe and reliable products and excellent after-sales service.</p> </p> How to replace light bulbs</p> 1. Power off and unplug: Turn off the power button and unplug the bug zapper.</p> 2. Discharge: Use an insulated handle screwdriver to touch the inner grille with high voltage for 30 seconds to 1 minute.</p> 3. Lampshade removal: Remove all screws from the grille and the outer grille on the side where the bulbs are located. Press both sides of the outer grille (left and right sides together).</p> 4. Twist and Replace Bulbs: Twist the bulbs until the base of the bulbs matches the slots in the bulb holders and remove them, replace them with the new ones, then twist a few turns to make sure the new bulbs fit into place and connect tightly with the bulb holders.</p> Light shooting and different displays may cause the color of the item in the photo a little different from the real thing. The measurement allowed error is +/- 1-3 cm.</p>