In general an axle is a centre shaft for a rotating wheel or gear. So In general axle shaft is on which the hub of the wheel is mounted. In a rear wheel drive, on side on the axle is attached to the differential assembly and the other side is attached to the hub.
The average cost of a vinyl replacement window is between $400-$575 per window for a double hung. That price includes the cost of the new vinyl replacement window and the installation of it. The big difference in price would be for reasons like the manufacturer of the vinyl window (which series you go with in their line), grids, low-e and argon gas for example. Vinyl casement pocket replacement window:
The product listed by Remodeling Magazine shows a retail average cost of $11,888.00 for the vinyl replacement window listed. We sell this replacement window for $7690. More than a third less than the average window company. Installer Direct pricing, low overhead and no advertising costs make all the difference.