Cook® Amplatz Sheath – Opaque Product Information Used to maintain a previously established nephrostomy tract. Additional Information FURTHER INFORMATION Related products Add to cart Cook® Dual Lumen Ureteral Access Catheter $0.00 Add to cart Cook® HiWire™ Nitinol Core Wire Guide $0.00 Add to cart Cook® Ureteral Dilator Set $0.00 Add to cart Cook® Urethral Dilation Access Set $0.00 Add to cart Cook® Williams Cystoscopic Injection Needle $0.00