This gopro holder makes it more convenient when you taking pictures or videos while diving. 

You can download knob file here: 

https://www.thingiverse.com/thing:163883

You also need a stainless steel one bolts with a M5 thread for a hexagon, 45mm long, and one M5 nuts .   

*It must have sufficient strength, so you need to print it with ABS, and the infill should be 100%.  

潜水时候拍照啥的用这个gopro支架更方便一点。 

旋钮文件可以在这儿下载： 

https://www.thingiverse.com/thing:163883 

需要一根45mm长不锈钢外六角螺丝和螺母。 

*潜水配件强度很重要，建议用ABS 100%填充打印。