The 4 pack rowing machine seat wheels with steel bearings are essential components for a smooth gliding experience on your fitness equipment. These replacement pulleys boast black nylon rollers for durability and compatibility with a wide range of machines. The 27mm diameter and 11.4mm height ensure a low-friction fit, minimizing energy loss and maximizing the efficiency of your workout. The 8mm inner hole provides stability and support, reducing the risk of wheel slippage and damage. In addition to their performance benefits, these wheels also come with 100% steel bearings, which are known for their durability and longevity. All you need to do is slide them into your existing seat post and enjoy a new level of comfort and convenience while working out.