This is a drop in replacement coil/bobbin for the Fender Dual 8 Professional. Wound to approximately 11.8k with 43 gauge plain enamel wire, wax potted and cloth black and white lead wires. Great for replacing collapsed bobbins or broken coils. Coil can be taped for extra protection. I recommend this because the exposed windings are very easily damaged. Just choose your preference in the drop down.