... floor spring door closer features:1. High quality casting iron floor spring door closer body.2. Filled with high quality anti-icing hydraulic ... left/right hand and single/doubleJBM Floor spring door closer details: Model number Floor spring door closer JBM-300Max Door ... #, 320#, 350#, 430#, 460#Outer size of floor spring(mm)Length 270mmWidth 125mmHeight 50mmTest500, 000 timesHold open85ºPacking ...