Rocker Swivel Base features -
1/4" pitch, coil spring rocker with 8 ball bearings, 5 Springs.
25" leg span, 5-1/4" high in front, black legs, plastic feet.
9" Diameter round bottom plate - provides maximum strength.
3 solid rivets per leg.
Extra large center stake rivets.
Pre-lubed raceway with 8 ball bearings.
Center pivot - allows for smoother rock and greater stability of chair.
Leg crimped along leg glide - provides longer lasting attachment.