Pen clicks to change message on barrel, a wonderful novelty advertising idea.

Colors: White/Red with White Tube, White/Black with Black Tube, White/Reflex Blue with white Tube, Black with Black Tube, White/Purple with White Tube

Imprint Area: Clip imprint:  1" x 3/16"
Barrel imprint opp side of clip  centered b/t windows:2 3/16" x 3/8" 
Message Tube: imprint area per line (6 total lines/approx. 30 characters) 1 1/2" x 3/32"
Barrel imprint in-line with clip:  1 3/16" x 3/8"
360 Barrel Imprint:  3 1/2" x 1 1/4"