The YoYoFactory Loop 2020 Yoyo is the ultimate looping yoyo! The Loop 2020 can be endlessly customized and fine tuned with many different accessory kits. The Loop 2020 comes with the standard #2 kit installed. With the #2 kit, the Loop 2020 will work well with standard polyester string.YoYoTricks.com Loop 2020 Yoyo Review