Official Extra Pre-Filter Kit (previously Upgrade Kit) for the Survivor Filter PRO and Electric PRO X Filter Systems. The Extra Pre-Filter Kit Includes: 1 Ultra Filter Pre-Filter 1 Inlet Silicone Hose, 7/32" ID x 3.25-ft 1 Outlet Silicone Hose, 7/32" ID x 1-ft Hose clip Float Zippered carrying case with wrist strap Instruction Manual The highlight of the Extra Pre-Filter Kit is the Ultra Membrane Pre-Filter, which is designed to get you the most out of your Survivor Filter® PRO, Electric PRO X and rated to filter up to 100,000 liters (26,417 gallons)! Extend the life of your Survivor Filter PRO and Electric PRO X Carbon and Internal Ultra Filter, by pre-treating the water with a 0.1 Micron Filter, before it even gets to the Carbon Filter and Internal Ultra Filter! Reliable and Easy to Use! Highest Quality Materials: ABS plastic, Ultra Membrane Fibers and Polysulfone materials that are very long-lasting, non-oxidizing and reliable 0.1 Micron Ultra Filter Pre-Filter acts like a barrier to help remove Pollen, Algae, Large Particles, Giardia, E. Coli, Protozoan Cysts, Cryptosporidium, Toxin and Heavy Metals Easy to clean and backwash, the Ultra Filter Pre-Filter is designed to last you a Lifetime! Designed with a high-capacity technology that allows it to be rated to 100, 000 liters, or we will send you a new one! Weighs only 3.5 ounces, up to 90% less than competing filter parts! Easily fits in your Glove box, tackle box, knapsack or BUG-OUT bag Larger, longer and reinforced tubes are included and are designed to increase the flow rate of your Survivor Filter PRO® and Electric PRO X BPA and Taste Free Detailed manual is included, featuring high-quality photos and step-by-step cleaning and maintenance guides