
The 18mm O2 Cap from HMF works when using an O2 simulator and the O2 port on the pipe needs closed. The 18mm O2 Cap is stainless steel and has an 18mm x 1.50 Thread size.
18mm - O2 Cap Features:
- Oxygen Sensor Cap
- Stainless Steel
- 18mm
- 18mm x 1.50 Thread size