this fingerboard wheels are made by high quality pu material， durable use in long time， precision hined to ride  and smooth.<br />bearing is included ! several colors available but note that we will send in random. to get one now， it is time to upgrade the old and weak fingerboard wheels. 100%  and high quality.<br /><br />specifications:<br />material: pu + stainless steel<br />color: send in random<br />dimension: approx. 7 x 4 mm / 0.27''x0.16''<br />one set included 4 pcs<br /><br />package includes:<br />1 set x fingerboard wheels ( 4 pcs)