These fast sinking, level tips have a Tungsten compound coating, are supple, do not kink and sink like a rock. Built on rio's ultra-low stretch connectors, they are extremely sensitive to soft grabs and ensure fast, solid hook sets. About the manufacturer: far bank is an integrated manufacturer and distributor of fly fishing products, including fishing rods, fly reels, fly lines, leaders, tippets and performance outdoor apparel. Search Amazon for a complete list of Remington, rio, and Sage products to outfit your favorite fly Fisher.