THUMB CAPS Stockwell Scientific's thumb caps are ideal for resealing 13mm and 16mm evacuated glass tubes. They are available in natural, blue, green, lavender, orange, red, white, yellow, and an assortment of these eight colors.

Part No. Description 8569 Cap for 13 ml evacuated glass tubes. Polyethylene, specify color. 8579 Cap for 16 ml evacuated glass tubes. Polyethylene, specify color.

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