uni-ball 63703 Fine Bullet Marker Blue

Industrial-grade oil-based marker

The uni-Paint PX-21 delivers permanent, opaque marks on virtually any surface including metal, plastic, glass and oily or greasy substrates. Its fine bullet tip produces precise lines suited to part identification, equipment labelling and layout work in manufacturing, construction, automotive and aviation environments. Quick-drying ink resists water, fading, heat and abrasion for lasting legibility. Valve-action flow control prevents the tip from drying out when the cap is left off.

Sustained marking performance

The oil-based formulation maintains consistent opacity and adhesion during extended use on dark or glossy materials without feathering or bleeding. Valve-action delivery keeps ink flowing evenly across long marking sessions, reducing the need to shake or prime the marker repeatedly. Resistance to heat and solvents means marks remain readable on components that later undergo washing, coating or high-temperature processes. Industrial-grade construction supports daily use on rough or contaminated surfaces.

Metal barrel with durable tip

A rugged metal barrel protects the ink reservoir from impacts common on job sites and shop floors. The hard-wearing fine bullet tip retains its shape on abrasive substrates such as cast iron, concrete or coated steel, preserving line accuracy over time. The secure cap seal works with the valve system to prevent dry-out between shifts, so the marker is ready whenever it is needed. Blue ink colour provides high contrast on both light and dark backgrounds for clear identification.