Sturdy cages feature rounded corners for easy cleaning Corner lugs or side arms allow stacking without scratching or jamming Filter covers (sold separately) maintain environment for optimum animal health; lock in place to assure containment Durable wire lids (sold separately) available for several cage sizes Tecniplast water bottles (sold separately) available for most cage sizes; fit securely beneath filter cove Reusable Polycarbonate Cages Withstand temperatures up to 121°C (250°F) Glass-like clarity with excellent impact strength Autoclavable Reusable High-Temperature Polysulfone Cages Withstand repeated autoclaving at 134°C (273°F) Molded of clear, special-grade PSF to withstand higher temperatures and provide better chemical resistance Order Info Lids and accessories sold separately