A: I cannot imagine they would not be ... but I am not an expert on food quality rubber so don't take my work for it. I can tell you they do not work well as a substitute for mushrooms in Chicken Tetrazzini. Actually that was kind of a disaster.
A: The rubber stopper is designed for fastener and hardware uses. These are not food safe.
A: These are essentially laboratory-type stoppers. Run them through the dishwasher one time to be totally sanitary...or wash by hand.
A: 1 inch = 25.4 Millimeters
A: (3/4") 19.05mm refers to the largest diameter of stopper. (9/16”) 14.2875mm refers to the smallest diameter of stopper.
A: The picture shows the 2 diameters...A good estimate (from the picture) appears to be about 1 1/2 inches tall. I no longer have the stopper, so unable to measure it directly.
A: This rubber stopper is about 24-25mm tall.
A: I already ANSWERED THE QUESTION!!..Did anyone bother to read it?
A: One inch
A: 3/4" refers to the largest diameter of stopper. 9/16” refers to the smallest diameter of stopper.