G-N72-164-D
O-Ring FL/300 G-N72-164-D O-Ring Size OD 78mm x ID 71mm x Thick 5mm
I chose this unbranded model because it fits my needs without the markup.
O-Ring FL/300 G-N72-164-D 381.10.10.010 O-Ring Size OD 71mm x ID 65mm x T 5mm
This unbranded tool is a bare-bones solution that does the job well.
O-Ring FL/300 G-N72-164-D 381.10.10.010 O-Ring Size OD 71mm x ID 65mm x T 5mm
Going with this unbranded option means you get exactly what you pay for.