DRERIO 6 Pcs Test Tube Clear Test Bottle Rack 100ml Capacity Transparent Sealing Container Tube Holder with Lid Centrifuge Tubes with 2 droppers and 2 Spare Test Tubes for DIY Craft, Bath Salt Vials. Each set will give two extra test tubes (one red and one blue), that is to say, there are a total of 8 test tubes, so you can buy them with peace of mind.
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