Extender Snaps, White Nylon Will Add 1" Inch Quickly to Your Boat Canvas, 5 Pc. Set These handy snap extensions allow you to add 1" Inch quickly and easily to your boat cover. Great for boat covers that are a little too tight or that have shrunk over the years. Made from heavy duty nylon webbing and Fasnap Brand Stainless Steel Snaps. Snaps will not rust or corrode and are designed for salt and fresh water environments. Another great product from the leaders in innovation and marine canvas design. Northwest Tarp Canvas specializes in working with boat designers and owners in producing top quality products. 5 of Each Piece We Ship Internationally! Northwest Tarp Canvas Take a Look Our Quality Tarps! Have a Nice Day!