Stainless Steel Beads
Stainless steel lysis beads are great for very tough tissues.
Cat. No. 11079115ss - 1.5mm dia 45g
Cat. No. 11079123ss - 2.3mm dia 90g
Cat. No. 11079132ss - 3.2mm dia 90g
Cat. No. 11079635ss - 6.35mm dia 100 beads
*Note: These beads are not sold in one pound amounts.
Stainless steel beads have a density of 7.9g/cc and are Type 316 stainless steel - the most corrosion-resistant available. They are used mostly for grinding leaves and seeds.
Stainless steel beads are relatively expensive but can be cleaned and reused. See here for methods for sterilizing and cleaning beads.
A more economic and time-saving option is to substitute chrome steel beads for stainless steel beads. Chrome steel beads are much less expensive than stainless beads. After beadbeating they can be quickly retrieved from the microvial with a magnet and discarded (i.e., no cleanup and no cross-contamination).
Whether using stainless steel or chrome steel beads, 'dry' grinding (no liquid media present) or cryo-grinding (beatbeating at liquid N2 temperatures) with these dense steel beads can crack common polypropylene microvials. BioSpec Product's XXTuff reinforced polypropylene vials or our stainless steel microvials with silicone rubber stoppers are recommended for these applications.
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