For sale is set of 5 nylon brushes in 3 sizes (2mm, 3x8mm, 10mm). I use these brushes with DeOxIt to clean Tube sockets on all vintage radio and Hi-Fi equipment in our shop. 2mm brush is perfect for Loctal and Miniature tube sockets, 8mm-10mm work great on Octal and Antique Tube Sockets. Brushes come with handy storage pouch. Shipped in first class package with tracking.