Pressure-regulated sprinklers maintain uniform flow across a broad range of pressures. Featuring an EverSpin Sapphire Bearing – the toughest, hardest, longest-life sprinkler bearing on the market. This precision manufactured bearing crafted out of a sapphire material – one of the hardest surfaces known – has been added to the bearing of the sprinkler at the point where the swivel’s pin meets the bearings surface wear-point – reducing friction, wear and promoting long-lasting sprinkler performance.