Product picture - Quantum Instruments ES2 Energy Saver for Canon 430EZ, 540EZ, 550EX, Nikon SB-24 & SB-25 Quantum, Instruments, ES2, Energy, Saver, Canon, 430EZ, 540EZ, 550EX, Nikon, SB-24, &, SB-25 Click the image to close this page