Comparison : Item # U-4-SS, Precision Metal Orifices - Press-Fit Inserts, 0.281" OD
Item # U-5-SS, Precision Metal Orifices - Press-Fit Inserts, 0.281" OD
Item # U-6-SS, Precision Metal Orifices - Press-Fit Inserts, 0.281" OD
Item # U-7-SS, Precision Metal Orifices - Press-Fit Inserts, 0.281" OD
Item # U-8-SS, Precision Metal Orifices - Press-Fit Inserts, 0.281" OD