If you order multiples you will not get duplicates UNTIL you order 6 :) Caridina cantonensis or the Crystal Red shrimp is kept by many aquarists and is prized for its striking colors. Unfortunately not every shrimp can have perfect colors so different patterns have emerged over the years and have been assigned different grades! Will you get a C grade? Or the coveted SS Grade! You might even get a Blue Neocaridina davidi that snuck into the group! Each Pin is 1" dyed metal with printed details and soft enamel IMPORTANT NOTES: All images are for example only. Due to differences in computer and monitor settings the colors represented might vary slightly from the final product.