"USED FOR PRESERVING MOISTURE;TO PROTECT CHEMICALS WHICH ARE HYGROPHIC OR REACT WITH WATER FROM HUMIDITY;FEATGITEM CONTAINS ABOUT .25 UNITS(6 GRAMS)OF DESSICANT AND MOUNTS THROUGH A 1.05""(26MM) DIA. HOLE;TYPE OF INDICATOR ELEMENT:40(40%RH);GASKET MATERIAL PER AMS-R-6855, CLASS II,GRADE 80;WT. 0.11 LBS;HAS HEX NUT WITH TORQUE VALUE 30""-LBS(3.4.M)"