yonex mavis 2000 nylon tournament shuttle (1/2 dozen) (pkg of 3 tubes(18pcs)-yellow medium speed) yonex the mavis 2000 line of nylon shuttlecock is an improvement over its best selling shuttlecock, mavis 500. with the new ribs on its skirt design, the yonex mavis 2000 nylon shuttlecock offers better spin in its flight and trajectory and little better durability.