Check the listing for details. (4) Lionel Post War Transformer Circuit Protection 5 AMP Auto-Reset Breakers. Condition: New. Listed at 24.00 USD. (4) Lionel Post War Transformer Circuit Protection 5 AMP Auto-Reset Breakers - ZW,ETCCompatible with all ZW's, KWs, LWs, TWs, SWs, 1033s, 1044s, etc.. Note: This listing is for BREAKERS ONLY !!! To Purchase TVS Diodes & Breakers, Purchase Both Here: https://www.ebay.com/itm/394018274083 Mandatory to protect your Modern Trains when using Lionel Pre/Post-War Transformers to Power your Layouts !!!!!!! Simple Installation in Series with Track Power Lines... Recommended for ALL Lionel Post War Transformers for added PROTECTION !!!! Link to TVS Diode - 5Amp Breaker Explanation:https://ogrforum.ogaugerr.com/topic/tvs-for-postwar-zw-at-outlet-instead-of-track-outputs-thoughts-on-this NOTE: The New Breaker installed in your Restored Transformer is to Protect the Transformer !!!In order to protect your trains, the Forum recommends using TVS Diodes and inserting 5Amp Breakers in series with the Transformer Output Lines to further protect your trains!Sold at: https://www.ebay.com/sch/ajs57/m.html Please email questions BEFORE you bid on our Items !!! Please email us if you have ANY PROBLEMS with the Items you receive BEFORE Leaving Feedback so we can Resolve any Issues... Returns are accepted for defective or damaged items.Any other reason will require a 20% restocking fee and buyer pays all shipping costs..