Being familiar with technology and materials is highly crucial, particularly in Endourology. What sorts of ureteral catheters are available? How do I dilate the ureteral orifice? What do I use in Nephrostomy? Are all catheters the same? How do I choose the most suitable catheter for each patient? How do I check the proper operation of my tower and how do I prepare the table with the materials before the endoscopic procedure? Small tips and practical knowledge. The Moderators will bring along with them all sorts of catheters they have been using lately in their Department.