RICHCO CER-6 CERAMIC BEADS / SPACERS / TUBES. These will work for CER-1, CER-2, CER-3, CER-4, CER-5, CER-7. The tubular spacers can be stacked and are used to install components raised off the PCB. Made of STEATITE C220 CERAMIC (RMS-170) and size of the CER-6 is inside diameter 1mm and outside diameter is 3mm and length is 5mm and are made to stack as STYLE 2. For every quantity of 1 added to your cart you will receive 10 spacers.