Fantasycart Fishing ROD Rigger Boat Holder Outriggers Pack Aluminum They are made out of 1-1/2" ID (1-7/8" OD) Anodized aluminum Pipe. ALL PIPE PIECES ARE CUT, SANDED, AND POLISHED FOR A PROFESSIONAL FINISH. These babies also is known as "POOR MAN'S OUTRIGGERS". They transform your boat into a fishing machine