Lot of 6 NOS BIRTCHER stainless steel spring loaded tube retainers for 9 pin miniature tubes. Five type 2C for tubes such as 12AX7 , 6DJ8 , etc. and one type 2D-2 for taller types such as 12BH7 , 6BQ5 , etc. FREE U.S. SHIPPING ! Thank you for looking !!!