AirStream Practice Golf Balls by JP Lann (240 Piece Bulk Box) * White type , 1-5/8" diameter. Weighs 1/4 oz. * Perfect for practicing your game in and outdoors. * These golf balls can also be used to practice full swings with any club. They are perfect for backyard training because they will never go to far due to the lightweight perforated design. * Great way to improve your short game in small places.