Acetate temple tips:
These temple tips, also called arm covers,temple covers are made of acetate material, they are hard and durable in use.
There are different sizes available, from 65mm (or even more shorter) to120mm length.
For holes, round holes and square holes avaiable. Round holes models comprise the majarity of temple tips, the holes could be from 0.8mm to 2.0mm size, most of temple tips are with round holes inside, such as C066,C076,C104 etc; for square holes, different sizes are available as well, such as C016.
You can find a lot of colors on them, and it updated every year, while the most popular colors are always same,they are still black,brown,tortoise,transparent etc.
The acetate temple tips are most popular temple tips among all different material temple tips, as they are hard and durable in use, yet it's hard to get dirty in use. Since they are hard as well, they are not flexible like silicone temple tips as well, which means,for example, one temple tip with round holes 1.3mm, which are only compatible with 1.2-1.3mm diameter round ended temples, no others.