The Duo Hi-Lo pedals offer a large aluminum platform to stay light weight, heat treated chromoly spindle for strength, precision sealed cartridge bearings to be smooth, and replaceable pins to ensure maximum grip. The pedals are customizable as well as they offer two sets of pins, 6mm tall and 8mm tall, to ensure you get the feel that works best for you. Sold in pairs. Specifications: Platform Size: 105mm x 102mm Platform Material: Aluminum Spindle Size: 9/16" Spindle Material: Chromoly Pins: 9 interchangeable Pins Per Side (Includes 6mm and 8mm pins) Color: Black Weight: 15.8 oz per pair