The Series CVP-1100 Knock-Down vinyl sliding patio door has welded-corner factory-glazed sash panels and a mechanically fastened master frame ready for jobsite assembly. It comes in 5- and 6-foot widths in heights 6 to 8 feet with a 4 5/8-inch frame depth. The door is fitted with 1-inch insulating glass units with 1/8-inch double-strength tempered glass, says the company. Other features include a latch locking pull handle, adjustable tandem rollers, stainless steel sill track and fully reversable sash panels.