High quality standard plastic replacement pedals with a steel spindle and a 1/2 inch thread. Please note that these pedals use a 1/2 inch thread and will not be suitable for the majority of adult bikes. If you're unsure whether these pedals will be suitable for your bike, please get in touch with us and we can advise further. These plastic pedals are the ideal replacement for children's bikes. With a steel spindle for durability and 1/2" thread.