Allows simultaneous preparation of up to 24 samples using solid phase ectraction (SPE.) Equipped with integral flow control valves, each with a disposable PTFE liner/solvent guide running through its length to eliminate the risk of contamination when consecutive samples are extracted in the same manifold port. Includes cover with 24 flow control valves & gasket; glass basin with vacuum gauge & valve assembly; collection rack (base, 2 support rods, center plate, 10 mm test tube plate, 8 clips); plate for 16 mm test tubes; 24 test tubes (10 x 75 mm); 24 liner guides (stainless steel); 100 quick-replace disposable liners (PTFE.) Replacement for REST-26080.