Thermo Scientific™ Screw Cap Micro Tubes robust design and material selection are well suited for work with biologics and offer rich features, including ultra-clear externally threaded tubes and UV protective amber tubes. Options are available with or without a self-standing skirted bottom, non-knurl and knurled tubes for single hand operation, in 0.5mL, 1.5mL and 2.0mL sizes, and the option of multicolored caps, with or without tethered straps. Screw Cap Micro Tube Caps offer a durable design incorporating an O-ring that helps prevent leaks under demanding conditions.