【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 practicalSpecification:Material: stainless steelSize Chart:4.35cm/1.71inchPackage Includes:1x Telescope Narrow Rail Primary Mirror Balance KitNote:Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.