2-Pack 182550 Replacement Filter Compatible with Bionair BAP536UV-U and Holmes HAP537UV / 2141139 Air Purifiers, with 6Carbon Pre-Filters

Compatible with--Our replacement filter is compatible with Bionair BAP536UV-U and Holmes HAP537UV / 2141139 Air Purifiers. | Size--Our 182550 Filter Dimension: 20.47" x 4.72" x 1.37". | Easy to install--Easy to replace and disposable, no tools required. Simply remove and replace from your machine unit when needed. | Service Guarantee-- If you have any questions about HF400 Filter Replacement, please feel free to contact us. | Life--We recommend you to replace the filter every 6-8 months and pre-filter every 2-3 months.