I only have these wonderful markers in some of their fluro range at the moment.

The below information is from the Liquitex website.

Professional Level Paint

Properties: Highly Pigmented, Water-based Acrylic

Finish: Satin

Nibs: 2mm chisel nib (line width 2-4mm) and 15mm nib (line width 8-15mm). Replacement nibs are available

Liquitex Professional Paint Markers: an outstanding range of professional water-based acrylic markers for artists. Lightfast and permanent, Liquitex Professional Paint Markers offer the widest selection of brilliant colors and a choice of sizes with precision nibs for ultimate control.   

Choose Liquitex Professional Paint Markers for:
• Color brilliance
• Water-based acrylic
• Lightfastness
• Durability and permanence
• Professional quality
• Matching with Liquitex color spectrum
• Optimized design
• Versatility
• Use on multiple surfaces 

 USES AND TECHNIQUES
• Large-scale artwork
• Intermixability with acrylics
• Fine detail
• Outdoor and indoor murals
• Underpainting
• Mixed media