Bassman,(general replacement/ upgrade), Hot Rod DeVille, Blues DeVille, 93 Concert / Super, Output Transformer. 4, 8, 16 Ohm version of 018343 & 041754. Another great multi-use version! With proper raised mounting = 2" x 3-1/2". Paper layer wound output transformer for that ultimate tone! Supplied with the best, cool running M-6 grain oriented steel! Made by Magnetic Components Inc. Right here in Chicagoland USA....Specifications 40-18001 Triode, USA Customer Service M-F 9AM-4PM CT 1-800-774-3201 Email us Anytime: questions@triodestore.com