Replacement Pinlock anti fog to fit Schuberth C4 and C4 Pro

Here's what Pinlock say

The Pinlock fog resistant insert lens is our premium solution for Schuberth helmets. This lens has become the benchmark for fog resistant performance that is most commonly used by riders across the world. The insert is made of a moisture absorbing plastic and, therefore the surface basically dry when used. The insert has a silicone seal that creates a double shield system.

Note there are two sizes to fit helmet shell sizes Small Shell -  XS to Lge and Large Shell - XL to 3XL