3102-4 | Insert, AL 1/2" X 4" 1/4"

Removable inserts are sized for probes with the named diameter. Use additional inserts to broaden the range of hole sizes available or to back up or replace existing inserts. This insert is designed for use with the 9009 Industrial Dual-Block Dry-Well

• Hole size: ¼ in (6.4 mm)