Easy to use pre-poured tryptic soy agar (TSA) Petri dishes. NO pouring your own plates, which is time consuming and NO autoclaving required. Our plates will arrive in excellent quality, or we will replace them with no questions asked. This is a great science kit to learn microbiology. Each plate is coated with a thick layer of agar perfect for lab use! See improved performance compared to other products. The thick agar surface prevents cracking and drying of the plates as seen with other kits. 100% money-back guarantee if you don’t absolutely love your set.