According to the official parts list located on Whirlpool.com, the Estate 29-inch electric dryer, model number EED4400WQ0, uses a belt drive, which is part number W10131364. Part number 341241 can also be used as a substitute.
The Poly V belt drive, part number 341241, features a four-rib and three-groove design and measures 92 inches long. This part, along with replacement parts for all Whirlpool home appliances, can be searched and purchased on the company's official parts site, WhirlpoolPartsOnline.com. Parts lists, owners manuals and other product literature for Whirlpool products can be located by model number on the company's website under the Manuals & Literature tab.