Good for 15 watts from a pair of EL84/6BQ5, 6V6GT, etc. Standard push-pull primary with three wires; red center tap, brown and blue plate leads. 8 ohm secondary. Charming vintage open frame construction with exposed paper bobbin. Measures approx. 2.25"X1.5"X2" tall. Mounting centers between the two mounting holes is 2.875", mounting tabs on bottom edge of transformer extend .5" on each side. We recommend installation by qualified service technicians. Brand New. Genuine Fender.