The Feather Chair Back Release Hinge, this part is for the back upholstery connection on the frame of the Featherweight manual wheelchairs and Featherweight power wheelchair. It is a silver hinge piece. It is not side specific and will mount to both the LH and RH backrest frame sides of the Feather Chairs. It is compatible on the the Featherweight manual 13.5lb chair (both grey frame and matte black frame), the heavy duty Featherweight extra wide manual chair, and the 33lb Featherweight power wheelchair. This piece is sold individually in quantity of one.