bd 303L-303100. 3-way stopcock with extension . L-303100. Set Length 105 cm ; Priming Volume 7.42 ml ; Bore 3 mm ; 1 Blue Stopcock Handle(s) 1 Female Luer(s) 1 Male Luer(s) PolyvinylTube BD 303 or Röhre BD303 ID51947, Transistor, Wires and PowerOutput shown. Radio tubes are valves.