ProForce Heavy Duty Bungee Cord Black 4 Pack PF. This bungee cord by ProForce is heavy duty and works well for building shelter. ProForce Heavy Duty Bungee Cords w/ Hooks are 30" long x 5/16" in diameter with black plastic coated hooks to help secure cargo packs or anything else you may be transporting. Features of ProForce Heavy Duty Bungee Cord: Length: 30 inches Cord Diameter: 5/16" Quantity: 4 Pack Plastic coated steel hooks Endless possibilities Package Contents: ProForce Heavy Duty Bungee Cords w/ Hooks ProForce PF71070: Heavy Duty Bungee Cord Black 4 Pack