12 in hanging baffle. Durable dome resists squirrel damage. Protects feeder and seed from squirrels and weather. Easy to assemble. All hardware included. Contents 1-3/4 in thread loop, 11-1/8 in x number 8 open eyebolt, 1 number 8 locknut, 1 clear polymer dome. Assembly instructions tighten the number 8 locknut at the end of the threads on the number 8 eyebolt. Hold the loop at the top of the dome and screw the number 8 eyebolt through the dome into the loop. To hook the feeder to the dome, hold feeder at an angle to slip eyebolt of feeder over eyebolt of dome. Feeder in picture is sold separately.