RoryTory 3pc Weather Resistant Bike Mount Phone Case with Under Seat Bag Pouch Weather resistant bike mount phone case with seat bag pouch. Easy to install mount that can be attached to any handlebar. 360 degree rotating head. To fit smaller phones the case comes with 2 foam inserts. 2 Size: small case fits up to 5.5 in. screens and large case fits up to 7 in. screens.