Three Ways to Order Your Science Supplies

Online - Pay by credit card, check or your account.

By Phone - Call us at 800.628.7748
Mon.- Thurs. 7:30 -12:00, 12:30-3:00 pm EST, Fri.Closed


By Fax - Fax your order with our
pdf form.

Two Hole Stoppers (Size: 7)

Size: 7. Top Dia. (mm): 37. Bottom Dia. (mm): 30. Approx. No. Per Lb.: 17. Durable, resilient black laboratory stoppers. Low in free sulfur.

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