Material: Aluminum; Hole Position: 6 Size: 1.25-Inch Package includes: 1x Filter Empty Box Product notes - This item is an empty box and does not contain any filters. - The box is designed to adjust eyepiece location to help you achieve a sharper image. Key benefits - Durable and lightweight aluminum construction for reliable field use. - Standard 1.25-Inch size fits common filter and eyepiece accessories. - Six hole positions provide flexible options for filter mounting and alignment. - Adjustable eyepiece location supports precise focus and improved image sharpness. Practical use scenarios - Set up and test a 1.25-Inch filter system by adjusting the empty box to explore different filter positioning and alignment. - During observing, fine-tune the eyepiece location to optimize focus and achieve a sharper image. - Transport or store a spare 1.25-Inch filter empty box as a dedicated placeholder or organizer for your accessories. Specifications summary - Material: Aluminum - Hole Position: 6 - Size: 1.25-Inch - Includes: 1x Filter Empty Box - Note: No filters included - Function: Adjusts eyepiece location to improve image sharpness