... 25mm Density: 0.8g/cm3 Soft type, White color PTFE steam packingSize: 3mm to 25mmDensity: 0.8g/cm3Soft type, White colorIt ... twining a spring,twine it on the valve rod,then press the cover,and the filler will be formed automatically,giving ... asbetos packing.Agelng-resislant,every to purchase and store PTFE steam packing