Saris climbing block

New, with tags Saris climbing block. For a stable, worry-free ride with any rear wheel-mounted trainer. Unique 3-level design let's you select the level of difficulty. Product features: -Keeps your bike level with your trainer. -Adds stability to your training ride. -For use with any rear wheel-mounted trainer. -Four separate height adjustments. -Stack two blocks together for climbing workouts. -Reduces back and arm strain. Model: 9701T