Amazon.com : Corrugated Plastic Cage Liner Base for Guinea Pig C&C Cage - for use with 13.8" Grids ONLY! NOT Measured by Feet- Used with Grid Cages for Guinea Pigs, Hedgehogs, and
Coroplast Bases for Guinea Pig Cages
Coroplast Base: How To Cut & Score For C&C Cages - YouTube