Pocket sized peace of mind, anytime, anywhere. The Dual Threaded Mini Filter weighs less than 2 ounces and features 28mm threads on both sides for added versatility. Lightweight, durable, and ready to go from the trail to your daily routine. Just thread onto a soda bottle or use inline with a hydration pack. System includes2 Dual Threaded Mini Filters2 Cleaning plungers2 Cleaning couplings