Our Bench Mount Shield is equipped with a Bendable arm for repositioning the acrylic filter to the right position. Instead of glasses, protect your eyes with a large viewing area of 5 inch round Filter . Excellent for Soft Glass Working applications. This polycarbonate is very efficient in filtering sodium flare in addition to providing good ultraviolet protection. It is very comfortable for viewing under high ambient light conditions such as when working with glowing heat sources for a duration of time. Also, although it has a relatively low luminous transmission of 38%, it is not recommended for glassworking where Infrared protection is needed. This filter is more for soft glass usage.