Versatile Design: This multifunctional telescope desiccant cabinet (without desiccant) can be easily converted from a 1.25-inch to an M42 photography extension tube, offering flexibility for various astronomical applications Sturdy Construction: Crafted from aluminum alloy, this desiccant chamber ensures long term durability and reliable performance in different environmental conditions Compact Size: With dimensions of 57mm x 46mm, this compact desiccant chamber is easy to handle and store, making it a convenient addition to your telescope accessories Enhanced Protection: Designed to keep your main telescope mirror dry and free from moisture, this chamber helps maintain optimal clarity and performance during observations Easy Installation: The design allows for quick and straightforward installation onto your existing telescope setup, ensuring you can focus on enjoying your stargazing experience without hassle Specification: Material: Aluminum Alloy Size Chart: 57mmx46mm/2.24inchx1.81inch Package Includes: 1xTelescope Drying Cabinet Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.