This is a replacement spray arm for your dishwasher. It is approximately 20 inches wide. This spray arm is made of gray plastic and is sold individually. The spray arm rotates and sprays water to clean your dishes. The spray arm can occasionally become clogged and damaged, and this can prevent your dishes from being cleaned properly. To replace the spray arm, turn clockwise to release, and attach the new arm by connecting it to the nozzle and turning counter clockwise. This is an authentic OEM part.