Pletscher Orion Seat Post Fitting Rear Rack with Mudguard

I recommend this product

Found a few problems with this, for a start would recommend using duct tape around the area to be mounted on the seatpost, leave for a couple days as found the plastic shims can slip, the tape removes the rubbish and improves the grip, do not leave the tape on. Due to weight make sure you a decent seatpost post bolt as mine was unable to hold its weight being a QR lever so switched it fro an Allen bolt skewer. Found if you can mount the box with nuts under the guard using penny washers inside, this improves the storage and avoids internal damage to what your carrying. Overall vey impressed and even has a metal not plastic guard complete with mudflaps a touch of class and make sure light is fixed with a cable tie or it will jump out.