The Armrest Pad for Feather Chair are for the Featherweight Manual wheelchairs. They are fully padded and attach to the Feather Chair armrests with two screws (sold separately). They are not side specific and fit both LH and RH armrests. They are sold individually in quantity one. They are compatible on both the Featherweight manual 13.5lb wheelchairs (both silver frame and matte black frame) and the heavy duty Featherweight extra wide manual wheelchairs. The armrest pad measures 10.5" Length x 2" Width x 1.5" Height.