Designed to replace a broken knob on a GE clothes washer. ID is 6mm and OD is 10mm. I've also included a smaller model that is quicker to print and test fit to the washer. 

This model is available to copy and modify on my public models at onshape:
https://cad.onshape.com/documents/4be3aa48b0344c475143cee2/w/2269fa9a057d4c79d3712744/e/3f1017a96b7acb62f62d7ff4?renderMode=0&uiState=69a52f44b8618a4eb4d63234