Specifications:
1) Polyurethane tread/steel core 6 x 2"
2) Load cap: 1,000Lbs
3) Top plate 4-1/2 x 6-1/4"
4) Zinc plated finish for corrosion resistance
5) 1/2" hollow axle (or 3/4"), 5/16" thick yoke
6) Zerk fitting in swivel race for lubrication
7) Hardened raceway available