Now The HP Plus Series is improved with these new features:

Dual-purpose, cutaway and pre-set handle for easy clean and precise control of paint flow
Teflon™ needle packing for automotive or other solvent-based paints
Larger threads on the nozzle give a more secure fit and better centering of the nozzle
Redesigned tapered gravity-feed cups ensure easy clean up and more efficient paint flow
Single-piece auxiliary lever/needle-chucking guide provides easy assembly
The HP-B Plus has a 0.2mm needle and nozzle and a 1/16oz (1.8ml) gravity cup.

The HP-B Plus is excellent for these applications:

Nail Art
Illustration
Fine Art
Photo Retouching
Figurines/Miniatures
Ceramics
Cake Decorating

The HP-B Plus features:

All of the new HP Plus features above
0.2mm nozzle
Gravity-feed with 1/16oz (1.8ml) cup
Dual-action
Internal-mix
Fine detail to 3/4" (0.2mm to 20mm) spray pattern
The HP-B Plus has the option to change to a 0.3mm nozzle for greater coverage and medium paints.

With a fine nozzle like the 0.2mm nozzle of the HP-B Plus, be careful to use paints with fine pigment and suitably thinned, as heavier pigments and higher viscosity paints can cause blockages. As a guide, thin paints to a milky consistency. If you have a query whether a particular paint is suitable for a particular airbrush.