Astronomical Telescope Balance Weight Set: This telescope dovetail counterweight rod with counterweight set is great for balancing your guidescope Material: Dovetail groove balance weight kit is made of aluminum alloy, this balance block offers durability and lightweight performance Package Includes: Each set includes 1 balance block, 1 counterweight rod, 1 counterweight, this dovetail counterweight kit is a reliable addition to your telescope setup Astronomy Telescope Accessories: Enhance your stargazing experience with this balance weight, designed for astronomy telescopes to ensure optimal stability and precision during observations Application: Ideal for both amateur astronomers and professional observatories, this three-axis dovetail balance system component is a must-have for anyone looking to improve their telescope's functionality Specification: Material: Aluminum Alloy Size Chart: Counterweight Bar: 15cm Balance Block: 5.9cmx5.9cmx4.7cm/2.32inchx2.32inchx1.85inch Package Includes: Set A: 1 Piece Counterweight Bar, 1 Piece Balance Block, 1 Piece 0.25kg Counterweight Or Set B: 1 Piece Counterweight Bar, 1 Piece Balance Block, 1 Piece 0.5kg Counterweight Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.