Each Simplicity suction dilator set include 4 hollow core dilators with dilation tips for the sphenoid, and frontal sinus varying in size from 4- 5 mm. The suction dilators include a bypass valve to control the vacuum assisted suction function. The handles are ergonomically shaped facilitating their use during primary or secondary dilation procedures. The Simplicity® solid dilator set is reusable and made from medical grade stainless steel. Each set comes with one year warranty.