A great way to secure those expensive dive tanks! Features include: Made of heavy duty plastic Easily adjusts to different sizes Designed to accompany 48 aliminum railing (acc407) Slide into the aluminum railing brackets for vertical, on-board storage Brackets fold down flat and out of the way when not in use 2 brackets included Fits all size tanks Railing not included An easy and safe way to help secure your diving tanks. "