The Prestacycle Prestaflator Micro CO2 Inflator Head weighs only 12 grams and has a unique feature where twisting the Co2 cartridge controls the airflow. Compatible with both Presta and Schrader with a perfect seal for no loss of Co2.Precision Machined alloy for long lifeTo inflate, Slightly un-screw the cartridge, and inflation begins. Unscrew more for faster flowItem SpecificationsColorRedDefined ColorRedIncluded CartridgeNo Prestacycle Prestaflator Micro CO2 Inflator Head CO2 and Pressurized Inflation Device UPC: 689466922202