I have four filters for sale. Three are TT filters model nrs. 220, 288, and 285. The fourth is an Inrad 6.3khz. 250 hz filter. I will take $150.00 for all four, or $50.00 each individually. Contact me at toby423 at earthlink.net. Shipping paid by me. Thanks for reading!. Toby K4CJW