Enhanced Tunnel Block

This transitional block features a volcanic rock passage that gradually expands from three inches to four inches in diameter. The widening tunnel prepares your reptile for entry into larger passages ahead, creating smooth dimensional transitions that prevent hesitation or confusion. The textured surfaces maintain consistent nail conditioning benefits throughout the expanding corridor. Interior contours guide natural movement while supporting muscular engagement during passage negotiation. The citadel-inspired exterior features architectural elements suggesting transition zones between different fortress sections. The multi-layer construction with XPS foam core and resin shell ensures thermal stability throughout the diameter change, maintaining consistent cool refuge temperatures regardless of the varying passage dimensions.