A 6"" power wheel with mounting plates. You will not need a box with this wheel. There's a lifetime warranty on the wheel and a 5 year warranty on the bearings.
This is a zinc plated steel V-groove power wheel. This wheel is 4"" x 1-1/4". A maintenance free wheel that has a 5 year warranty. The wheel comes with spacers to fit 30-40-BX box. Receive a quantity discount when you purchase 10 or more and again at 20 or more.