Bond Elut Jr Nexus, 200 mg, 50/pk. Bond Elut SPE cartridges range from 1 to 150 mL in a wide range of bonded silica and polymeric chemistries, sorbent particle sizes, and bed masses. The Luer-compatible Bond Elut Jr and the large reservoir capacity (LRC) tubes offer flexibility across a range of sorbent bed masses. Tabless (flangeless) versions of the straight barrel cartridges are also available.