Older radiators tend to make unpleasant noises. Regular bleeding using the heating ventilation protects your hearing and improves heating . Suitable for most standard heating : The heater exhaust have a square socket of 5mm. With this, you can quickly and easily drain almost any heater. Make from Zincs Alloys, strong, Enduring and . Not easily damaged or deformed. Our heating is small and compacts. This allows you to ventilate comfortably at any of the smallest angles. Package includes: 10Pcs Radiators