... 2.CCS and EC approval 3. type :2.5KG , 4.3KG 4. material : HDPE , hard PU Solas lifebuoy for marine 2 ... life saving . The life buoys of more than 4.0kg are used to release the self activated smoke ... code , and MSC.81(70) Techinical paramenters :Weight :≥ 4.3kgBuoyancy ::≥18.5 kgInner diameter :440 mmout diameter :440mm ... material :hard PU Certificate : CCS , EC 2.5kg / 4.3kg solas life buoy/life-buoy