Heavy 3/8" elastic cord is great for creating custom tie downs to secure tarpaulin covers and tie-downs for trailers and pick-ups, canopies, sailing and other marine uses, etc. Simply add our 3/8" bungee hooks to create your own custom length bungee cords. This durable rope gives a more flexible stretch up to 100% of its original length. The polyester fabric jacket is considered marine-grade because it better resists water damage, abrasions, cracks, splits, and UV rays than typical polypropylene shock cords. A multi strand rubber core creates a consistent and smooth stretch. Black. Length: 50 foot.