this is a small clip designed to wipe out dust of the filament before it pulled into the nozzle part.Use a small piece of cloth folded to wrap around the filament then clip it on.Please pay attention,keep the edge of the cloth under the top of the quarter-round part and make sure the quarter-round towards the entrance.I believe this thing can reduce the risk of a jamming nozzle.Bye the way, no support is needed during the printing.

这个夹子是设计用来在线材进入挤出机之前清洁上面灰尘用的。可以找一小块干净的布料折叠几层然后包裹在线材上再用夹子把它夹好，小圆突出的部分是起到限位的作用，所以布料尽量不要超过它的顶端。对于没有封装的机器或者材料适用环境较差的用户，这样做能够极大的减少堵头的风险。打印不需要做支撑。