【Telescope Accessory】: Enhance your stargazing experience with this essential telescope accessory, designed to provide optimal balance and stability for your equipment 【Construction】: Crafted from stainless steel, this balance kit ensures long last durability and resistance to wear and tear, making it a reliable addition to your telescope setup 【for Narrow Rails】: Specifically designed for narrow rail systems, this component rails approximately 43.5mm in width, ensuring a secure and for your telescope 【Versatile Weight Options】: Available in multiple weight options (0.25kg, 0.5kg, 1kg), allowing you to choose the good balance configuration for your specific telescope needs 【Easy Installation】: Telescope dovetails mounting plate, easy to replace and install within seconds, no complicated tools needed. This dovetails plate can be used to astronomical telescopes, connect to other equipment to use, professional and practical Specification: Material: stainless steel Size Chart: 4.35cm/1.71inch Package Includes: 1x Telescope Narrow Rail Primary Mirror Balance Kit Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.