I do believe they are called "Floor Mount" drawer slides made by Knape and Vogt Check out this link

http://www.drawerslides.com/c/floor-mount-drawer-slides

Good Luck!

Each area was designed independently based on use. You can see in the photo that some held salad dressings and other bottled goods. Others a collection of can goods where space allowed. All areas have pull outs except the shelves to the left which are only about 6" deep. You would have to spend some time and map out how you would use your own space to suit your specific needs.

This pantry is a custom design made by a local cabinet maker. The pantry has a range of drawers and pullouts to serve a family of 5.