Feature●Diameter: 32mm(1-1/4").●Color: Yellow, Green, Blue, White. according to your choice.●Microscopy Filter Biological Microscope Compound Filter.●Good Durability: Selected high-quality materials, with good durability and stability for long time use.●If you are not satisfied with the product, please feel free to contact us, we will provide you with quality after-sales service.Description Package includes: 1pcs. According to your choice.