The Symmetry Surgical 51-6818-B3-16 is a precision McCrea-style urethral sound designed for infant and pediatric urethral calibration and dilation. Its 18 Fr diameter and 7-inch (177 mm) curved length facilitate gentle, controlled passage through narrow pediatric urethras during cystoscopy preparation and stricture management.

Key Features:

• 18 Fr diameter optimized for infant/pediatric urethral sizing and dilation
  
• 7 in (177 mm) overall length with gentle McCrea curve for anatomical navigation
  
• Smooth, polished stainless steel shaft minimizes tissue trauma
  
• Tapered/proximal handle ring for controlled manipulation and acoustic feedback
  
• Reusable construction suitable for standard autoclave sterilization protocols