DetailsHarmsco ® HB-10-1-W 10 Inch Big Blue Water Filter - 9 3/4" Long by 4 1/2" diameter - 1 Micron Big Blue - 8 per case, sold individually. Made with a proprietary blend of Polyester-PlusTM filter media. Cleanable and reusable in most applications, individually shrink wrapped. Flow rates Up to 15 GPM (56 LPM). Order a case and save even more.