U-VSG5495 / U-VSG5497.INITIAL PUNCTURE NEEDLE- 2 PART TROCAR TIP.MATERIAL STAINLESS STEEL.LENGTH 20/30CMS. GUAGE 18. USED FOR PERCUTANEOUS NEPHROSTOMY AND ALL OTHER PRECUTANEOUS APPLICATIONS WHERE A 0.035 INCH GUIDEWIRE IS TO BE USED.TROCAR TIP.