Head and Neck Restraints (FHR/HNR) devices are date stamped on the SFI tag. They need to be recertified every five years. Necksgen charges $15, Simpson charges $25 for recertification only, repairs or replacement items may be extra. Please contact the below manufacturers directly to have your device recertified.Necksgen - (619) 328-0410 - 1176 Greenfield Drive, El Cajon, CA 92021www.necksgen.comSimpson/Safety Solutions Hybrid Models - (800) 473-7077 - 185 Rolling Hills Road, Mooresville, NC 28117 www.teamsimpson.comSimpson/HANS - (800) 654-7223 - 328 GM 306 New Braunfels, TX 78130 www.teamsimpson.com