24 colours of refill are available Calligraphic Tip Great for large paintings & backrounds Replacable tips - refillable This is for 1 x 15mm marker Here we have an empty 15mm marker that is designed to be used with the Montana Gold Acrylic paint range. There is a full range of 24 acrylic paint refills that can be used to fill the pen up, with the 15mm tip offering many possibilities for the creative and artistic user, ideal for calligraphic lettering and filling in larger surface areas. Works well with the 0.7mm and 2mm empty marker pen