For various height adjustment
PART # THREAD DIA. HT. A PRICE R20-50-JS 1/4"-20 .50" 1.50" .375" $40.00 R20-1-JS 1/4"-20 1.0" 1.50" .375" $52.00
PART # THREAD DIA. HT. A PRICE R8-19-JS M8 19mm 38mm 11mm $45.00 R8-25-JS M8 25mm 38mm 11mm $55.00