Searching for Calibration Cap Parts: Tips from a Technical Expert

Client:
Hello, I am looking for plug parts in order to perform calibration.

Technical Advisor:
Hello,

Technical Advisor:
We have that https://ph-redox-pool.com/gb/probe-holder-and-support-collar/1638-12-ph-orp-probe-holder.html, you can also use an old probe.

Client:
OK, do you have a small male screw cap?