This filament holder is based on 2020 sized aluminum extrusion.

For each filament, you need print 2 circular parts and 4 sticks, and put them together with glue.then you can put it on 2020.(in picture three)

Then print other parts.

Eight bolts with a M4 thread for a hexagon, at least 25mm long, and eight M4 nuts, to put the whole holdr on.(in the last picture)

基于欧标2020的耗材支架。

每个耗材支架需要打印2个圆的零件和4根小棍，用胶水粘好，套2020上作为内轴。（图三）

然后打印其他部分。

整个耗材支架用8颗M4螺母和螺丝安装。（最后一张图）