Designed compatible with Compatibility: tailored to fit primary mirrors with diameters of 76mm, 114mm, 135mm, and 150mm, this focusing seat enhances your astronomical observations by providing a stable and reliable platcompatible withm compatible with your tonian reflector telescope. Material and Build: Crafted from durable, plastic, this focusing seat is designed to withstand the rigors of frequent use while maintaining precise focus adjustments, making it an essential accessory compatible with both amateur and professional astronomers. Enhanced Astronomical Experience: By securing your telescope's primary mirror effectively, this focusing seat minimizes vibrations and ensures a clearer, more stable view of celestial bodies, enhancing your stargazing sessions and astronomical studies. Safe and Easy Installation: This focusing seat comes equipped with all necessary components compatible with a hassle-free setup, allowing you to quickly upgrade your telescope's capabilities without the need compatible with professional help or specialized tools. /Features: This focusing seat is crafted from ABS plastic, ensuring durability and a lightweight design. It is specifically designed compatible with tonian reflector telescopes with a diameter of 150mm or less. The seat features three pre-drilled screw holes compatible with easy installation and is highly compatible with PVC pipes that have outer diameters of 110mm and 160mm. This makes it an ideal choice compatible with enhancing the stability and focus of your telescope setup. Specifications: Material: ABS plastic Total Length: 160mm Effective Extension: 65mm Average Height of Focusing Seat: 130mm Package Includes: 1pc focusing seat Applicable: Suitable compatible with installation on tonian reflector telescopes with a diameter up to 150mm; compatible with PVC pipes of 110mm and 160mm outer diameters. Color: As Shown Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The mea