304 STAINLESS WITH BLACK PLASTIC LINER SIZE 9″ X 1-3/4″ ADJUSTABLE SIZE 7/8″ TO 1″ RAILS. A MUST FOR ALL FISHERMAN. CAN BE PERMANENTLY MOUNTED. USE IN SALT OR FRESHWATER. BOATING AND FISHING SUPPLIES. ANY QUESTIONS PLEASE CALL 0. THANK YOU FOR SHOPPING WITH US. Check out my other items. Be sure to add me to your favorites list.