Description
Aries (AF 10 3611 BB) 10"x4.5" Big Blue Perchlorate Selective Filter 20 inch x 2.5 inch Filters2647 and sediment down to 1 and sediment down to 1 micron while protecting against cysts Each box contains 20 individually sealed pouches designed for field calibration and rinsing of water quality meters with ±1% accuracy at 25°C