The Meade #1402 Tube Balance Weight System permits the balance of heavy or heavily-leveraged accessories attached to the eyepiece end of your telescope. A low profile bar attaches to the underside of the front and rear cells of the telescope-and can be permanently left in place, even if you're not using heavy accessories. Three sliding weights(1, 2, and 3 lb) slide onto the bar, alone or in any combination combination, to precisely balance photo accessories and heavy visual accessories.