Amazon.com : Corrugated Plastic Cage Liner Base for C&C Cage - for use with 13.8" Grids ONLY! NOT Measured by Feet- Coroplast Used with C&C Cages for Guinea Pigs, Hedgehogs, and Rabbits (
Amazon.com: Corrugated Plastic Cage Liner Base - Fits Inside 47"x24" Guinea Pig Cage - Actual Dimensions 22.5" x 46" - Replaces The Canvas (Blue) : Everything Else
Cutting & Scoring Coroplast for Guinea Pig Cage - YouTube