For use in combination with a supporting open frame structure adapted for connection to a handle and formed from a material of generally circular cross-section, there is described a net replacement unit which comprises a resiliently deformable, tubular cover and a depending net formed integral therewith. The cover has an inner surface defining an ovate longitudinal bore communicating through a slot coextensive with the bore along its narrow side for reception of the frame therethrough. Additionally, the cover is provided with a plurality of longitudinal ribs coextensive with the bore and extending thereinto from the cover's inner surface in a particular orientation to bias the frame to retain the frame in the cover, yet permit the cover to be readily snapped on and off the frame using only hand pressure when necesssary to replace the net and/or cover.
