Power & Output transformers, plus Choke. Power Transformer has 120V/240V Dual Primary. All 3 transformers you need in one package. Made in USA, see individual items for specs... Get yer Build on.... Power Transformer: 40-18029 Choke: 22699 Output Transformer Secondary options include: 2 ohm (40-18007), 4 ohm (40-18011), 8 ohm (40-18010), 4 & 8 ohm (40-18008), 2, 4 & 8 ohm (40-18000), or 4, 8, & 16 ohm (40-18001) bassmanbundle OutputTransformer: 2 ohm (40-18007)4 ohm (40-18011)(+$1.93)8 ohm (40-18010)(+1.72) 4 & 8 ohm (40-18008)(+$5.78)2, 4, & 8 ohm (40-18000)(+9.65)4, 8, & 16 ohm (40-18001)(+$11.93) PowerTransformer: (40-18029) Choke: 22699 Triode, USA Customer Service M-F 9AM-4PM CT 1-800-774-3201 Email us Anytime: questions@triodestore.com