That URL I listed was for an RFQ "session"... If it gets lost, go to www.potentiometers.com (also State Electronics) and navigate to: 'Instrument Knobs' > 'Military Series' > 'Spinner'. Put the suffix (5S2B)in the spaces provided and send it in, or just call the 800-number and they'll get them right out to you. Cheers John KB6SCO