Straight intermittent catheters, often just called straight or male catheters, are designed to drain the bladder for individuals with neurogenic bladder or other conditions in which the bladder does not function properly. The most common straight catheters are non-coated smooth PVC with staggered eyelets for drainage. Some have fire-polished eyelets while others have polished eyelets. Feedback from customers suggests that fire-polished eyelets may be the best. Catheter lubricant must be applied in order to use them. They are available in straight and curved packaging, male or female or pediatric lengths, and a variety of French sizes. The funnel of the catheter on most brands are color-coded for the French size. The French size is a measure of the inside diameter of the tube. Buy straight catheters for men and women from LoCost Medical Supply and they are delivered quickly and discreetly right to your door. You can even have them delivered automatically at any interval you choose, and you can change the delivery amount and time whenever you want.