The AstroMaster accessory kit is the complement to the AstroMaster telescopes. It provides additional magnification, and filter to identify details of the planet. You can use it at any other telescope with the 1.25-inch ocular piece. The AstroMaster accessory kit consists of: 15 mm Kellner eyepiece 6 mm Plossl eyepiece 2x Barlow lens with a T-thread planetary filter, # 80A blue planetary filter, # 25 red moon filter microfibre cloth padded box