Tubing comes in three options:
Light: 3/8" outer diameter black tubing
Standard: 1/2" outer diameter amber with 1/4" inner diameter
Heavy: 1/2" outer diameter amber with 1/8" inner diameter
Hand wrapped with nylon line. Experienced slingers may prefer the heavy tubing. Beginners should use the standard tubing. These slings can be re-wrapped when the tubing wears out.