MPN: 234-00-099 - FOX - Spring Preload Collar - Rear Shock Part. Spring preload collars for Fox suspension. We are out East at 3063 Columbia Ave. - Lancaster PA, 17603 & out West at 3225 Grande Vista Dr. - Newbury Park, CA 91320 & 165 Design Place, #105 - Sparks, NV, 89441.