Nispira premium carbon water filter compatible with Lifestraw Steel, Universal and Go Series water bottle. Activated carbon removes chlorine, contaminants, and any odor from the water. Post filter removes any residue left in the water. Each filter can produce about 26.4 gallons of fresh drinking water. Filter Size: 0.6" x 0.6" x 0.8". Easy to install. The filter is designed to improve the flow rate and produce better water quality. 8 filters included. Perfect for water bottles, this filter lets you enjoy fresh, clean water wherever you go — ideal for travel, hiking, camping, and outdoor adventures. Stay hydrated with confidence and convenience.