For holding a variety of parts with suction

PART #               THREAD         DIA.       HT.     
R20-10-SC           1/4"-20          .73"       1.75"
R20-15-SC           1/4"-20          .89"       1.75"
R20-20-SC           1/4"-20        1.13"       1.75"
R20-30-SC           1/4"-20        1.64"       2.50"
R20-40-SC           1/4"-20          2.0"       2.50"
R20-50-SC           1/4"-20        2.52"       2.50"

PART #             THREAD          DIA.         HT.    
R8-10-SC               M8            19mm     44.5mm
R8-15-SC               M8            23mm     44.5mm
R8-20-SC               M8            29mm     44.5mm
R8-30-SC               M8            42mm     63.5mm
R8-40-SC               M8            50mm     63.5mm
R8-50-SC               M8            64mm     63.5mm