The revolutionary Hans Adjustable offers an all new design for vastly superior comfort regardless of the driver or vehicle set-up. The Adjustable can be easily adapted to any driver's torso through a unique system that allows for adjustments in 5-degree increments from 10-40 degrees. No longer do you have to purchase your Hans Device based on seat-angle and torso fit - One device can be adjusted for just about any driver or car! The device is made by an injection molding process using a metal alloy for strength, and a fire-resistant nylon coating. Metal fasteners that employ Spiralock technology enable a driver to adjust the legs of the HANS to alter the angle of the collar in five-degree increments: At 970 grams, the Adjustable is lighter then the original Sport model (1,100 grams). All Adjustable models feature Hans' Sliding Tether system, allowing a comfortable, fuller range of motion. Device adjusts in 5 degree increments, from 10 to 40 degrees One model fits all types of race cars and seats About Certifications: SFI is the United States standard for safety equipment certifications. FIA is the European standard for safety equipment certifications. It’s not uncommon for racing equipment to be certified by both the FIA and SFI, but many times its one or the other. Our HANS Devices are all rated SFI and many are SFI & FIA Rated. Please review product title to determine certification ratings. SFI is required in the United States at most tracks, in most forms of racing. If other sellers are not advertising SFI they probably are not rated and using unrated equipment will likely fail tech safety inspection in the United States. Specs: Includes Quick Click Anchor System Size: Medium Designed for SA helmets where M6 Nuts are not already installed