Casting Dams, for use with 7cm gel
https://www.daifengwang.com/shop/54-e1007-cd-casting-dams-for-use-with-7cm-gel-14648
https://www.daifengwang.com/web/image/product.template/14648/image_1920?unique=bff3db2
This for is guaranteed a Dams, with the use of use and directly supplied to your lab by Gentaur's warehouse.
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Shipping: 2-3 Business Days