Kendrick Astro Instruments Baader Film Solar Filter in aluminum cell, #6008. Fits C5, ETX 125 nd any scope with tube OD of 140mm to 150mm. Gives great views of sunspots with sun disk as nice white image. Filter has been used only a few times and is in excellent condition. Sells for $75 new, will sell for $45 (includes shipping in US}. Plese email for additional information or to buy. Thanks for looking.