Exposure Saddle Rail Bracket for GoPro Attaquer 33g with mount INTEND:INT MASSIVE203 33g with mount Expanded 460% range gives the added coverage 1x gravel riders demand The Saddle Rail Bracket slides neatly onto saddle rails spaced between 42mm and 64mm apart Saddle rail compatibility: Fits saddle rails spaced between 42mm and 64mm apartLightweight construction: Made from carbon and 6063 aluminium for strength and low weightGoPro style compatibility: Works with any GoPro style 2 prong bracketStreamlined mounting: Provides a clean and secure rear light mounting solutionDurable hardware: Finished with black stainless steel mounting hardware for long lasting performanceUnderslung setup compatible: Designed to work with Side Entry Brackets for optimal stability