Pantry doorway opening:
    W   11' 15/16"
    H   4'  6 7/8"

VEVOR 36 Inch Heavy Duty Drawer Slides, Locking Drawer Slides 500lbs Load Capacity Long Full Extension Drawer Slide 1 Pair Side Mount Ball Bearing Drawer Glides Push to Open Drawer Runners Rail
$ 89.99

Lee Valley

Extra-Heavy-Duty Slides - 400 lbs - 36"
$ 189 

Home Depot

Paulin 1 x 36-inch Perforated Steel Square Tube - Zinc Plated
$ 39.67

Kitchen Storage & Organization

Kitchen Lower Cupboards

Below Sink

Trinity Sliding Undersink Organizer
$86.87

Pots & Pans

Richelieu 363 mm (14 1/4-inch) Pull-Out Cabinet Organizer with Soft-Close Slides, Graphite Finish
$ 84.98

Richelieu 2-Tier Pull-Out Storage Drawer with Soft-Close Slides for Base Kitchen Cabinet Organization, Graphite Finish, 14 1/4-in
$ 179.00

Richelieu