_x005f_x000D_ _x005f_x000D_These radiator keys are made of quality zinc alloy, light and practical, durable and sturdy, not easy to break, easy to hold and turn, even after screwing in a few rigid valves, there is still no distortion on the key. The radiator key is useful for bleeding air from radiators. _x005f_x000D_ _x005f_x000D_Features _x005f_x000D_ _x005f_x000D_-Color:Silver. _x005f_x000D_-Material:Zinc alloy. _x005f_x000D_-Size: About2.90X2.20X1.00cm/1.14X0.86X0.39in. _x005f_x000D_- Very strong zinc alloy material, exquisite workmanship, wide range of application. _x005f_x000D_-Can improve the efficiency of the radiator and prevent noise from being generated in the radiator. _x005f_x000D_-The ventilation key can be used universally and is suitable for almost all common radiator. _x005f_x000D_-You will receive 6pcs ventilation keys, which are light and durable. _x005f_x000D_-Corrosion-resistant polished zinc alloy keys. For air vents to release air from water-filled radiators.Packing list6 x exhaust valves