
They don't have anything special, the sticker on the back is a bit harder to remove, the "protective tape" and they basically just collect dirty air and trap substances that would normally be covered and flung in the fan blades. Every little thing helps I think. It keeps the fan blades clean and makes it easier to see when the fan blades need cleaning. This extra large "6 pack of 2" was cheaper than buying individual 2 packs. They seem to get very dirty after about 3 months of continuous fan use or 6 months of average fan use, YMMV.

LG G7 ThinQ Poetic Guardian Series Case - Hybrid Shockproof Bumper Clear Cover With Tempered Glass, Blue
22 Review

Adjustable Drip Irrigation Kit With Misting And Cooling System - 59Ft (18M) Auto Micro Irrigation For Gardens, Landscapes, Patio, Greenhouse, And Plants By Gesentur
26 Review

15-Foot Round Sun2Solar Solar Cover: Keep Your Pool Warm And Clean!
21 Review

πΏ KIMO Cordless Leaf Blower & Vacuum: 2-in-1 20V Leaf Blower for Lawn Care, Dust, & Pet Hair - Lightweight, Mini, Handheld Electric Blowers with Battery and Charger included, 150CFM Power
22 Review

Ceiling lamp Yeelight Smart LED Ceiling Light YLXD76YL, 23 W, armature color: white, shade color: white
15 Review

π°οΈ Vintage Pendant Light with 3-Light Cage Shade for Kitchen/Dining Room - DLLT Adjustable Mini Hanging Fixture in Black
10 Review

LED office lamp Baseus i-wok Series USB Asymmetric Light Source Screen Hanging Light Youth, 5 W, armature color: black, shade/shade color: black
13 Review

Ceiling lamp Yeelight YLXD013, 50 W, armature color: white, shade color: white
38 Review