Snow Joe SJ624E Ultra Electric Snow Thrower, 21-InchAdd BuyDig store to favorites. Snow Joe SJ624E Ultra Electric Snow Thrower, 21-Inch. MFG Part #: SJ621. Deluxe size model is ideal for clearing snow off large driveways and walkways, No gas, oil or tune-ups make it effortless to start and maintain, Powerful 14-amp motor moves up.