This easy-to-mount flag pole is designed to last for years. The 1/2" dia. flag pole is made of 304 stainless steel. The clamp is made of 316 stainless steel and will fit 7/8" dia. tubes. The Whitecap Flagstaff is 17" long and comes with flag clips and an easy-to-use adjustment knob. Flag not included. 17"L x 1/2" diameter pole Attaches to 7/8" dia. railing | Clamp-On Stainless Steel Flag Pole