Extruder internal oil seal.
Oil seal model: Skeleton Oil Seal-NBR Shaft Oil Seal-NQK*SF-TC4-17-7
Oil seal parameters: inner diameter * outer diameter * thickness: 4*17*7mm
After the completion of the printing need to clean, dry after avoid light preservation.
*Fragile accessories, it is recommended to buy a few more pieces.
Reference link:（This linked product is for reference only, Eazao has not tested it, and its reliability is yet to be verified.）