Beckman Coulter 344058 38.5 mL, Thinwall Ultra-Clear Tube, 25 x 89mm - 50Pk. New, unopened box. This round bottom tube is designed for use in Beckman Coulter instruments and rotors. Ultra-Clear tubes are transparent, allowing for easy location of visibly banded or pelleted samples. Compatible Ultracentrifuge Rotors• Fixed Angle: Type 70 Ti, Type 50.2 Ti• Swinging Bucket: SW 32 Ti, SW 28 Compatible High Performance Rotor• Swinging Bucket: JS-24.38Please double check this is the right tube for your rotor(s) before ordering it. Thanks!