Syringe Adapter allow for the link-up of syringes with catheters, pipette tips, and straws. Straw Adapters allow 1/4cc or 1/2cc semen or embryo straws to be manually filled by using a syringe as vacuum source. Simply connect a 1cc or 2cc syringe to the green luer end and push a 1/4cc or 1/2cc straw into the blue end and use the syringe's plunger to load the straw. A simple, very inexpensive method of loading straws. Since the syringe and adapter are only being used to create a vacuum and coming into contact with the liquid, this setup can be used multiple times.