Check the listing for details. Lionel Post War Transformer Protection - BREAKER BLOCK & 5AMP Breakers & TVS -ZW. Condition: New. Listed at 44.95 USD. Lionel Post War Transformer Protection - BREAKER BLOCK & 5AMP Breakers & TVS -ZW PACKAGE INCLUDES:(1) Lionel Post War Transformer Circuit Protection - BREAKER/FUSE BLOCK(4) Lionel Post War Transformer Circuit Protection - 5 AMP Auto-Reset Breaker - ZW,ETC(4) Lionel Post War Transformer Circuit Protection - TVS Diodes 1.5KE36CA - ZW,ETC(8) Crimp Wire Connectors Compatible with all ZW's, KWs, LWs, TWs, SWs, 1033s, 1044s, etc.. 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 and Transformer Terminals ... Recommended for ALL Lionel Post War Transformers for added PROTECTION of your Modern Trains & Engines !!!! 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..