".2mL PCR tubes"

Constant flow air sampling pump features clear external filter housing allows an immediate visual inspection of filter’s condition. The flow fault indicator lights up if unit operates outside ±5% of set flow rate. Battery test indicator lights up when battery can provide a minimum of 8 hours of operation over operating range.

Sturdy Hand Pump Features Hose Connectors For Vacuum And Pressure

Welch DuoSeal is a single-stage pump with metal vanes and motor mounted on steel base with rubber feet.

More economical than an electric vacuum pump.

Welch DuoSeal Two-stage Pump operates at a low rpm, runs cool, and reaches maximum vacuum with less back streaming.