Secure 6mm stainless steel nut connection guarantees vibration-resistant fixation, preventing accidental dislodgement during operation. Hollow spherical devise provides optimal buoyancy-to-weight ratio, ensuring sensitive valve activation and reduced mechanical stress. Ideal for upgrading residential water storage systems, commercial irrigation controls, livestock watering valves, and industrial liquid regulation devices. Available in 8 standardized diameters (50mm, 60mm, 73mm, 80mm, 90mm, 100mm, 110mm, 130mm, 150mm) to suit diverse installation needs. Ideal for water tanks, caravans, ponds, and hydroponic systems., Manufacturer: SFQEVHRZ