All syringes are 10cc and come with an 18 gauge needle and alcohol prep wipe. When using this product, shake the syringe vigorously to evenly distribute the culture. Make sure not to use too much culture, a little goes a long way. Too much can encourage contamination from mold to bacteria. You have 10 days from day of package receipt to contact me with any issue with your liquid culture. Contaminated grains will NOT count for replacement or refund. LC MUST BE TESTED ON AGAR and pics need to be provided.