THESE STANCHIONS ARE MADE OF A DURABLE, LIGHT WEIGHT, POLYETHYLENE AND INCLUDE C-HOOKS TO HOLD CHAINS IN PLACE. AVAILABLE IN SOLID AND BI-COLOR OPTIONS. HOLLOW BASE CAN BE FILLED WITH SAND OR GRAVEL FOR GREATER SECURITY. SOLD INDIVIDUALLY WITH A 3 INCH DIAMETER POST, 16 INCH DIAMETER BASE AND A 41 INCH POST HEIGHT. CHAIN SOLD SEPARATELY.