... 18273(fire-rated ) 3,200,000 test cycles 4,Fire door used Stainless Steel 304 Grade lever handle H10015 featuresConform to ... /DIN 18273(fire-rated ) High frequence of use for public building 200,000 test cycles High corrosion resistance With sliding bearing ... also would like to supply cylinders, handles and other related door hardware to our dear customers .Meanwhile,we have been OEM ...