8" x 3" Extra Polypropylene with Precision Ball
Perfect use for Helicopter platform, for Cranes
Load capacity 2,500lbs
 
8" x 3" with Roller Bearing 1"
Load capacity 2,500lbs
 
8" x 2-1/2" with Roller Bearing 1"
Load capacity 2,000lbs
 
12" x 3" with Roller Bearing 1" + Bushing 3/4
Load capacity 3,500lbs