Get rid of the glare with this 32mm thread-on filter. The Circular Polarizing Lens Filter is a great addition to any 32mm Zoom Tube or Field Tube to enhance your viewing near the water. Significantly cuts down on glare and increases contrast so you can wave-find, bird-spot, and even peer into the depths of an alpine lake No-Matter-What Lifetime Warranty Works with Field Tube and Zoom Tube Threads directly onto Nocs Provisions Zoom Tube 32mm and Field Tube 32mm monoculars. Lens rotates independently to remove polarized and improve color saturation, contrast, and reflections. Light-weight and durable all-aluminum construction. Threaded design for easy installation onto your monocular. Lightweight & Pack-Ready Designed with portability in mind, the attachment is compact and easy to carry. Adventure-Grade Construction High-quality aluminum construction combines strength with a lightweight design; aluminum material not only enhances durability but also gives the attachment a modern aesthetic. Universal Mounting Threaded design for easy installation onto your monocular (not included); threading ensures a secure connection so you don't have to worry about it coming loose while viewing. Compatible with the Nocs Provisions Zoom Tube and Field Tube monoculars.