Rain Bird 50' Spacing Plastic Impulse Sprinkler. It features an easily adjustable spray radius with a distance control dial, allowing you to customize your watering coverage. The water-saving PJ spray guide arm controls the water stream, while the diffuser screw helps prevent brown spots by breaking water into smaller droplets. With a high gallonage output, this sprinkler can space up to 41' apart. It has a 1/2 inch male pipe thread and is made of durable ABS plastic.