Flex Fletch Zing Primer Pen .4 oz.. Eliminates the need to clean the base of Flex Fletch vanes before fletching. Simply apply the primer to the base of the vane and then fletch as normal. Also speeds up set and cure times for fast set glues. Package Contents: Flex Fletch Zing Primer Pen For use with Zing fletching glue or other fast set cyanoacrylate glues. Eliminates the need to clean the base of Flex Fletch vanes before fletching. Simply apply the primer to the base of the vane and then fletch as normal. Also speeds up set and cure times for fast set glues.