I am selling a BASIL MIK system mounting carrier base plate adapter. If you have a bag with the MIK system or are planning to purchase a BASIL bag, by attaching this base plate to your rear carrier, you can utilize the MIK quick-release system. The shape of the compatible rear carrier also offers a high degree of freedom, making it convenient to use. This product is brand new and unused, only inspected. Thank you. MIK Carrier Plate Carrier Side Base Size: Length 250mm, Width 126mm, Thickness 35mm Compatible Carrier Size Thickness 8-16mm (diameter) Width 100-170mm (outer diameter) Load Capacity: 15Kg Changes a carrier without a MIK system base to one with a MIK system base. (The MIK system functions when used with the main unit, so a MIK adapter plate is required separately when attaching MIK system-compatible bags/baskets, etc.) Changes a carrier without a MIK system base to one with a MIK system base. (The MIK system functions when used with the main unit, so a "MIK system mounting main unit adapter plate (020114)" is required separately when attaching MIK system-compatible bags/baskets, etc.)