trumpet shape, straight, 5-1/2″ (14.0 cm) Iowa Needle Guide is a trumpet-shaped instrument used in the pudendal block procedure. The guide features a long, thin cylinder through which the needle can be passed. It also features a ring handle at the proximal end for secure grip by the surgeon. Please note that website images are often representative of the product family and may not conform to the exact specifications or features of the item you select. The final specifications will match the description of the specific catalog item you select.