Our new NANO Brewery 304SS Shower balls for recirculation and sparging purposes.  1/2″ BSP female threaded at one end and the ball end consists of 1.5mm holes from the base of the ball upto half way up the ball.  Spicifically designed to deliver a gental shower effect accross the grain bed when recirculating during the mashing process and showering water across the grain bed when sparging.