PRE-ORDER NOW, MORE READY 6 WEEKS! Replacement for chokes in Dynaco ST70, Mk2, Mk3 and Mk4. 1 1/2 inches (40 mm) tall on 2 3/8 inch (60 mm) mounting hole centers. 55 ohms, 1.5 henries, 10% tolerance, 2500 volt DC hipot tested, 200 ma DC. The maximum ripple voltage 35V @ 120 Hz. New unit MADE IN USA. Sunn Replacement Part# 3-10C C354 Dynaco Choke Replacement also Sunn 3-10C MADE IN USA - MORE READY 8 WEEKS! c354$99.95 Triode, USA Customer Service M-F 9AM-4PM CT 1-800-774-3201 Email us Anytime: questions@triodestore.com