Ohio Valley offers a wide variety of one-piece ferrules. We offer ferrules in 100% Graphite, 60% Graphite/40% Polyimide, 85% Graphite/15% Polyimide, 100% Polyimide, and 100% PFTE ferrules. Various combinations of reducing ferrules are available. The sizes range from 1/16″ OD to 1/2″ OD and 0.4mm ID to 1/4″ ID. We also offer no-hole ferrule plugs and 2-hole ferrules. If you do not see the item you require, please contact us for a custom quote.