Dial 3428 Replacement Pad MMB14 Mobile Mastercool 20-1/8" X 28-3/8" X 3" Replacement Pad MMB14A-D Mobile Mastercoolby Adobeair 20-1/8" X 28-3/8" X 3" Replacement Pads for Mmb14a-d Mobile Mastercool By Adobeair. DO NOT BUY if you have the newer Champion Mobile Mastercool