4 ml - 40 ul ultrafiltration unit with twin vertical membranes and sleek internal design for fastest sample concentration with highest recoveries. The pipette friendly dead stop pocket eliminates the risk of sample filtration to dryness and facilitates the recovery of the concentrate. Vivaspin turbo 4 can handle up to 4 ml sample volume in 4 swing-out and fixed angle rotors accepting 15 ml centrifuge tubes. The Vivaspin Turbo 4 optimized design, the sleek internal profile, ensures maximum process speeds right the way down to the last few micro liters after > 100 fold concentration. The UV joining technology allows for a smooth joint transition between membrane and plastic housing, allowing the collection of the complete concentrated sample into the unique pipette friendly dead stop pocket.