Features: Crafted from strong materials, designed for long term use. Suitable for various telescopes, this cover is ideal for individuals. Protect your telescope from debris, dust and other small items. Multiple size for different telescopes, meet your need. Fit closely to the telescope, easy to operate. Specifications: Material: Aluminum Alloy Size: As Shows Diameter: m42/m48/m54 Note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color. Package includes: 1pc Dust Cover