Pella 150 Series West 72-in x 96-in 4-9/16-in Low-e Argon White Vinyl Sliding Left-Hand Sliding Double Patio DoorThe Pella 150 Series West vinyl sliding patio door offers superior vinyl quality, dependable performance, and exceptional longevity. Its dual pane high altitude low e insulating glass delivers balanced insulation for all climates, regulating temperature and keeping homes comfortable year round. A smooth operating roller system on the sliding panel ensures ease of use, while the long lasting, high grade vinyl frames undergo performance testing for