Description The Rapids™ was designed to provide an economical solution for analytical laboratories that need ASTM Type I water of resistivity up to 18.0 meg ?/cm This water kit is ideal to use with tap water or pretreated water depending on your laboratory needs. FEATURES Fully customizable for your laboratory needs Easy installation requiring no electricity Small footprint This cartridge kit is compatible with the Rapids™ Type I Water Purification System. This cartridge kit consists of one D00335 (Pretreat Type I), and three D00332 (Mixed Bed High Purity). Need additional assistance installing the cartridge? Contact our Technical Service Team: Email: technicalservice@labstrong.com Phone: 563-588-8900 Helpful videos can also be found on our YouTube Channel and custom playlists – https://www.youtube.com/user/LabStrong – Made in USA with Global Materials – Please Note: Cartridge Kit not included with the Rapids™ Type I Water Purification System.