Replacement HydrostaticReplacement Hydrostatic Release mechanism for Ocean Signal Category I EPIRB’s.Must be replaced every two (2) years from date of installation.Compatible With:Ocean Signal Category 1 EPIRB’s*Sold as an IndividualWARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov. Specifications:Type: Mounting BracketsBox Dimensions: 4″H x 6″W x 10″L WT: 0.42 lbsUPC: 5060266110108