Draw Slides
Promark 20 Inch 100 LB Capacity Full Extension Soft / Self Close Ball Bearing Side Mount Drawer Slides - 10 Pair Pack
https://smile.amazon.com/dp/B00B854SMC/ref=pd_luc_rh_sbs_02_01_t_img_lh?_encoding=UTF8&psc=1 $9.40 per pair for 20"
Available in both 20" and 24" lengths.
Some people think it is best to get Fulterton slides or Blums bottom mount Blumotion slides. Knape&Vogt are also ok. All these named brands are unnecessarily expensive.
26" KV Soft Closing Drawer Guide (pair)
http://www.barkerdoor.com/KV-drawer-guides-and-slides-s/113.htm
http://www.barkerdoor.com/26-Soft-Closing-Drawer-guide-pair-of-slides-p/kv%208455b-26.htm $24.95 for pair
"Recommend ordering the drawer box "DEPTH" the same as the guide length. For example, if you have a drawer box at 10" wide, by 4" tall, by 18" deep, then you should order a 18" long drawer guide."
https://drive.google.com/file/d/0Bzwky0fD9tvBMjU3Y2EzYWItOWI0NC00Njc5LTkxYTgtZWE0MmYwZTcxMDBi/view