3M Aqua-Pure AP810 Whirlpool WHKF-GD25BB Compatible Whole House Water Filter 4 Pk1 set of replacement filters with following :

4 x 10" Big Blue CTO Carbon Block Filters

• CTO Carbon Block Filter - Size 9 7/8" x 4.5" 
• 5 micron nominal filter to remove small particles and carbon fines that may pass from second stage & to ensure 100% of chlorine removal from water.

Fits Brands: 3M, American Plumber, Aqua-Pure, Culligan, Flow-Max, Grainger, Hydronix, Keystone, Omni Filter, Pentek, Tier1, Whirlpool WHKF-WHPCBB

Alternate Part Numbers: Culligan RFC-BBS-D, 48169, 155141, 1020705, 10 inchBig Blue Housings, 155141-27, 155141-30, 155141-43, 155141-51, American Plumber 155141, American Plumber W10-PR, AmericanPlumberW15-PR, American Plumber WRC25HD, Ametek RFC-BB, Ametek RFC-BBS, BrunerRFC-BBS, GEFXHSC, GEFXHTC, GEGXWH30C, GEGXWH35F, HD-950, KleenPlusRFC-BBS, OmniFilterBF6, Omni FilterBF7, Omni FilterT06, PentairRFC-BBS, Pentek 155141-43, Pentek RFC-BB, Pentek RFC-BBS, Plymouth RFC-BBS, RFC-BB, RFC-BBS, RFC-BBSA, RFC-BBSA-D, RFC-BBS-D, TO8, TO8-2-01, TO8-2-02, TO8-2-05, TO8-R-05, USFilter RFC-BB, USFilter RFC-BBS, W5CBHD, WRC25HD, RB-RFC-BB, TIER1-RFC20-934

Total 4 filters, each individually wrapped.

All our filters individually wrapped for freshness and protection while in shipment.

Sediment filters are used to remove particles such as sand, dirt, silt, and rust. To remove these particles it allows a better performance for the following Carbon Block or GAC filters.

Carbon Block filter. Removes chlorine, bad taste and odor, organic solvents and organic chemicals that contribute to bad taste and odor.