Personally, I would say really pass on the Tip cleaners. The last thing you want to but in the flash hole is something abrasive. The welder's tip cleaners are exactly that. they are abrasive and they are a cleaner. In most instances you never have to clean the flash hole in the vent liner with anything solid.

I use actual pin gauges for the size you might need. This link should take you the gauges.

https://www.mscdirect.com/browse/tnpla/88909700?cid=ppc-bing-New%20-%20Measuring%20%26%20Inspecting%20-%20PLA_W5ZBZFNY__be_73804768041810_c_&mkwid=W5ZBZF NY#navid=12107889+4288162416

I purchased 0.031 thru 0.035 gauges to cover what I thought I might need. I reality you really might only need the 0.035 - once the flash hole errodes to 0.035 it is time to get a new one.

Lehigh Vent Liners come from the factory with a 0.031+/- flash hole diameter. If you are tracking errosion then you meed the set.