You searched for "parallel bore"
Igus
Igus Iguform S270 14 Teeth Spur Gear, 0.5 Module, 2mm Bore Diam, 7mm Pitch Diam, 5mm Hub Diam
Part: S270GM-ST-050-014-00-020-R
Micro plastic spur gear for small precision equipment and compact mechanisms.
Igus
Igus Igutek P360 14 Teeth Spur Gear, 0.5 Module, 2mm Bore Diam, 7mm Pitch Diam, 5mm Hub Diam
Part: P360GM-ST-050-014-00-020-R
Small plastic spur gear for compact machinery and automation equipment.
Igus
Igus Iguform S270 18 Teeth Spur Gear, 0.5 Module, 4mm Bore Diam, 7mm Pitch Diam, 7.8mm Hub Diam
Part: P360GM-ST-050-018-00-040-R
Precision compact plastic spur gear for small machinery and precision systems.