This IV set is one of the easiest to use and most durable intravenous systems ever designed. Its pure gum rubber funnel with air vent fits any standard 500 mL bottle, and comes with stainless steel needle. The Simplex IV set has a molded finger, clog-stop air vent, and pure gum rubber tubing. It fits any standard 500 mL bottle, and comes complete with a stainless steel needle. Clear tubing measures 5 feet long.