For holding surfaces using suction on an adjustable base

PART #              THREAD       DIA.        HT.         
R20-10-SSC        1/4"-20      .73"       1.75"   
R20-15-SSC        1/4"-20      .89"       1.75"       
R20-20-SSC        1/4"-20     1.13"      1.75"    

PART #              THREAD      DIA.         HT.         
R8-10-SSC             M8        19mm     44.5mm 
R8-15-SSC             M8        23mm     44.5mm  
R8-20-SSC             M8        29mm     44.5mm