Khatod's 90 mm diameter SiO3 JUNIOR lens, made of ultra-clear liquid silicone rubber (LSR), is optimized for COB LEDs with a light-emitting surface (LES) of 13 mm to 19 mm. The rotosymmetric versions also work well with a COB LES of 23 mm. Like other silicone lenses from Khatod, the SiO3 JUNIOR boasts excellent transparency, high optical efficiency, resistance and flexibility in a wide temperature range, and UV resistance, among other features. Easily fit the SiO3 to the final application by fastening it with screws or by using the low-profile LED holder (available separately) for safe contacting of the LED.