National Brand Alternative 2489518 O-rings are designed to restore leak free faucet spout operation in residential and commercial fixtures Each pack includes 3 bags with 100 O-rings per bag totaling 300 precision molded rubber seals per order Each ring measures 21/32" inside diameter 13/32" cross section and 1/8" wall thickness with AS568B dash number 115 profile O-rings withstand temperatures from 86°F to 248°F helping eliminate drips and save up to 15 gallons of water per month.