A wide variety for just about any application. From elastic to Kevlar to Tubular Nylon. Elastic is great for light weight applications and can stretch to 175% of length. Flat nylon comes in with a 900# tensile strength and has loops sewn in for easy attachment or replacement. Great for almost all high-power flights. Tubular Nylon is the strongest we offer with over 2,200# Tensile rating. For Extreme application, it has loops sewn into the ends for easy attachment or to replace your existing cord!