This Uriah Products 5-bolt replacement axle hub kit is designed for marine trailers and other similar utility trailers. It's a BT16 type designed to provide heavy-duty durability for axles that are rated to 1, 250 pounds. This kit includes a 4-1/2" bolt circle, 5 bolts and nuts, and 1-1/16" inner and outer bearings. | Uriah 5 Bolt Hub Kit, 1-1/16" Bearings