Although the Silhouette brand is the first to incorporate this nose pad design, there have been similar designs in the past that would label the mount style of the nose pads as plug-in. More commonly found in Nike brand eyeglass frames and a few others as well.
Here are some specifics about this nose pad;
1. The pad length is approx. 11.2mm in along the longest area of the nose pad.
2. The width is approx. 7.2mm across the widest portion of the nose pad.
3. The area where the nose pad arm inserts or plugs into the nose pad measures approx. 2.3mm at the longest part.
4. The opening measures 1mm top to bottom of the area where the nose pad arm inserts.
5. The pad is made of a semi-soft material called vinyl which allows medium flexibility.