This acrylic plug is available in 20 gauges from 8 gauge through 2" gauge. Every gauge has two grooves for the included o-rings. Plugs between 8 gauge and 3/4" gauge have a 5/16" wearable area between the o-rings and are 1/2" thick end to end. Plugs between 7/8" gauge and 2" gauge have a 3/8" wearable area between the o-rings and are 5/8" thick end to end.
Please be aware that these are molded plugs and the ends tend to have a textured look. Some look a bit scuffed up on the end but this is just how they are made. Apparently it's the texture of the mold.
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