The Rope ZUP Tow Assist ball does just that...keeps the tow rope UP. Can be used on towables with capacities up to 4-riders. By keeping the tow rope out of the water, you reduce drag and increase gas mileage on the boat...That’s whatZUP! Reduced drag also enhances tube performance on turns and slides. The oval shape of theRope ZUP allows the ball to rotate freely in the water and absorb shock on the rope 

Bladder Construction K-80, .75, 30 gauge
Rope Length (included) 60'
Rope Diameter 1/2"
Rope Break Strength  4800 lbs
Dimensions 36" x 26"