#012 3/8"ID x 1/2"OD 0.070" Cross Section Fluoroelastomer Standard O-Ring / OUTSIDE DIAMETER: 0.5 INCHES NOMINAL TEMP RATING: -15.0 DEG FAHRENHEIT AND 400.0 DEG FAHRENHEIT CROSS-SECTIONAL HEIGHT: 0.063 INCHES NOMINAL CENTER HOLE DIAMETER: 0.375 INCHES NOMINAL END ITEM IDENTIFICATION: 3930015999978 HARDNESS RATING: 90.0 SHORE DUROMETER A NOMINAL MATERIAL: PLASTIC FLUOROCARBON