These new stainless steel bottle stoppers are made of 304 or "18/8" FDA
stainless steel. ("18/8" possessing 18% chromium and 8% nickel combined with 0.08% carbon). This material
mixture provides corrosion and oxidation resistance, because of its ability to withstand the corrosive
action of various acids found in fruits and vegetables. This is the same 304 stainless steel that is used
for utensils, sinks, coffee pots, refrigerators, and flatware to name a few items in the kitchen.
Our custom designed, stainless steel bottle stoppers include 3/8-16" x 5/8" long
thread and an overall length of 3 1/2". Combined with FDA EPDM black O-Rings that operate in
temperatures from -55 Celsius to +150 Celsius and provide excellent sealing and wear ability for
chemical resistance from alcohol or wine. EPDM material is also resistant to breakdown when sitting
out in the air as opposed to Ni-tron.