Williams D-11581-574 Audio Sound PCB 105C Cap Kit. This Williams sound board cap kit works on pinball games such as Whirlwind and any other williams D11581 (William System 11B) pinball games with this sound PCB. “Mega Deluxe Cap Kit” All capacitors are 105c including the Axial caps in this kit. All of our Cap Kits / Get Well Kits include a sticker so you can place it on the PCB to help you keep track of the work you did and when it was done. 13 Capacitors total included in kit with great instructions. Our kits have some of the BEST quality, low ESR, and longest life capacitors in them.