The ARS Freezing Straw Filler is a system designed to assist in filling 0.5ml freezing straws without the need for mouth aspiration. This Device fills up to 5 straws at a time using a thumb wheel pump. A built-in positioner holds the cotton plugs in place to ensure a consistent volume  of extended semen in each straw. Four Plugs are included to cover unused ports on the straw filler if less that five straws are to be filled.