●This is a pair of pedals for replacing and repairing aerobics, spinning bikes, and exercise bikes from many manufacturers. It also comes with a soft rubber strap, so you can exercise comfortably even when you pedal with bare feet ●The pedal part is made of PP resin for durability, and the belt is made of soft rubber material so it wont hurt your feet, and the belt has 6 holes so you can adjust the size of the belt, so it will keep your feet in place during fitness activities ●Tested and installed on exercise bikes and training bikes from various manufacturers including aerobics, spinning bikes, fitness bikes, and more ●2 bolt sizes: Pedal bolt shaft size is 9/16 (screw diameter approx. 14.3 mm)); Pedal bolt shaft size is 1/2 (screw diameter approx. 12.7 mm) ●Size: Width 3.7 x Length 4.3 x Height 0.8 inches (9.5 x 11 x 2 cm) (pedal part) Weight: Approx. 12.7 oz (342 g) (weight per pedal) x 2