High pull strengths. Arrow Spring-Wire Guides offer exceptional pull and tensile strength when compared to other brands. This strength helps assure more certain catheter placement with a minimum of risk. In addition to high strength, Arrow was the first to introduce: Arrow DuoFlex® double distal with straight soft tips on both ends. J wire on one end with a straight soft tip on the other end. Great selection. Arrow offers a variety of Spring-Wire Guides, from .018 to .035 diameter, and lengths from 25 to 85cm. -A number of soft and J tips are offered.