AllGoodThings
Member
According to the part number, these are PTFE coated. ~$1.20 a piece isn't cheap, but it's a decent price on these. I get that it's hard to stomach when most people don't care.
www.calpaclab.com
Wheaton® 20mm Stopper/Plug, Polymer Coating, case/1000
Wheaton® 20mm Stopper/Plug, Polymer Coating, case/1000

