• Hard non-toxic nylon
• Economical, safe and effective enrichment device
• Inert content does not interfere with research study data
• Excellent for rats on powdered chow or liquid diets
• Satisfies instinctive gnawing and chewing behaviors
• Helps reduce aggressive behavior
• Available in 3 flavors
• Autoclavable and cagewasher safe
• Certified (Contaminant Screened)