The filter stack cover can be used to protect your filter from dust and reduce dust or small sand from falling on your lens or filters as much as possible, which is convenient for your photographic life.

Specification
Color: Silver
Material: Aluminum Alloy
Applicable Filter Diameter: 39 mm / 1.54 Inch
Outer Diameter: 41 mm / 1.61 Inch
Tooth Pitch: 1 mm / 0.04 inch
Packing List: 1 Pcs x Lens Filter Stack Cap (Front Cover and Rear Cover）

Advantage
Sturdy Material: The Metal Lens Filter Stack Cap is made of durable aluminum alloy, which is hard, wear-resistant, dust-proof, scratch-resistant, and can be used for a long time.
Portable to Use: Screw type rotating cap cover, which can better protect the filters from dust, scratches and fingerprints. It is convenient to carry and takes up little space.

Instruction
Just put the filter in the box and screw the cover. Multiple filters can be stacked at the top and bottom.

NOTE:
1. Please choose the size according to your needs.
2. The outer threads of variable ND filters are usually larger than the inner threads, so this stacking cap will not work with variable ND filters.