The Top Panel (Add-On Piece For guinea Pig Habitat 171gh Or Replacement Part For guinea Pig Habitat lus 171ghp) Is Made Of Durable White Power-Coated Metal Wire. The Top Panel Comes With Hinged Openings Providing The Pet Parent With Easy Access Into Either Side Of The guinea Pig Habitat / guinea Pig Cage For Easy Maintenance And Play Interaction. The Top Panel Also Allows For great Hygienic Air Ventilation And Creates A Secure Barrier Ensuring Your guinea Pigs Stay Inside The guinea Habitat And Predators Stay Outside. Midwest Homes For Pets Stands Behind The Quality Of Our Products With A 1-Year ManufacturerS Warranty. If You Have Any Questions About The Top Panel Or The guinea Pig Habitat Our Customer Service Department Would Be glad To Help You. Midwest Customer Service Can Be Contacted At: 1-800-428-8560, Available 8:00 Am - 5:00 Pm, Monday - Friday.