The HJC Pinlock Insert is suitable for use on RPHA 10 Plus (HJ-20P) Helmets. The Insert clips between the two adjustable pins in the visor, and can be easily swapped when riding environments change.Clip between two adjustable eccentric pins in Visor.Inserts can be swapped depending on your riding needs.Moisture absorbing plastic and the silicone seal.Insulating air layer between Pinlock insert and visor.World s number one anti-fog product.The HJC Pinlock Insert is extremely tough and durable and offers outstanding optical clarity.Pinlock is well known for it s patented anti-fog technology in the global market and is expanding. Pinlock offer 3 different performance levels in our range of insert lenses, to enable everyone to enjoy a clear and fog-free vision when riding. The insert lenses range starts from the Pinlock 30, Pinlock 70 and Pinlock 120 lenses. The number is used to describe the levels of fog free clearance the insert lenses provides in order to acclimatise to temperature dif