Review on EZ SPARES 2 Pack Eureka HF5 HF-5 Vacuum HEPA Filter - Reusable & Washable, Compatible with Part # 61830, 61830A, 61840 by Tina Walker

As previously mentioned I had to make adjustments to fit this item in my Eureka Whirlwind 5740. I couldn't physically get the plastic tab. Hands to install the filter no matter how hard I try. I then used a hammer and a flathead screwdriver to pound the plastic tab to slide it into the mount. A few taps on each corner and the tongue locked into place. Minor inconveniences, but for the price of two filters for one OEM filter, you get what you pay for.