ITEM NAME:Board Peg Mountain Bikes Folding Multifunctional Foot Rest Rear Back Seat Features: Suitable for mountain bikes. Scope of application: Bicycle back seat. 5mm mounting hole, 10mm can also be installed. Made of manganese steel, fine workmanship, good hardness and toughness. Specifications: Solid, divided into a metric and inch, length is about 60MM, opposite side height 17MM, diameter 50mm. Specifications: Material: Manganese steel Color: black Package Included: 1 Pair x Footrest Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement..Suitable for mountain bikes. Scope of application: Bicycle back seat. Due to the light and screen difference, the item's color may be slightly different from the pictures. Anyway we will try our best to avoid this kind of thing.