Secondary trap connects between the vacuum pump and the freeze dryer or evaporator to provent migration of organic solvents into the pump interior.Cartridge contains 11 ounces of activated carbon media.3/4" OD inlet and outlet connections.Includes 20" rubber tubing, 3/4" ID x 3/8" wall, and one clamp.
Traps are connected between the evaporator and vacuum pump to provide additional protection to the pump.