Rosco Round UV Pass Double Coat Filter (2.0") Hoya A-55YA3 For longevity it is acid

For longevity it is acid free and internally buffered while it is also instant drying and highly water resistant for easy handling

4mm bezel diameter

F/ Leica E82 on Noctilux-M Lens

It has an ergonomic design and soft rubber grip for comfortable right-handed use in your home or office computing space

delivering power for up to 5 fixtures when placed in the main power feed

Rosco Round UV Pass Double Coat Filter (2.0") Hoya A-55YA3 For longevity it is acidAllows Only UV A to Pass True Black Light Effect Used in Entertainment, Forensics Used in Rock Hunting, Medicine This 2. 0" Round UV Pass Double Coat Filter from Rosco is a dichroic filter that blocks visible (normal) light and allows only UV A light to pass through for a true "black light" effect. This type of light is often used in fluorescent tubes in entertainment venues. This filter drops into a holder that fits a fixture appropriate to its size.