Fine-tune the balance on your solid steel–tube Dobsonian telescope with the Farpoint 1.5 lb Magnetic Weight Bag. Strong neodymium magnets hold the bag firmly in place anywhere along the optical tube length for precision balancing, with the ability to quickly adjust its position when the center of gravity shifts due to the use of a different eyepiece or the addition of other accessories. The bag is made of tough rip-resistant Cordura nylon and is filled with 1.5 pounds of lead shot that is heat-sealed in plastic.