This is the last time we talked about this drier.
there is a cross section of the canister in this link. the slight glass is about 70% through the bead pack.
at 5 cfm @ 50% duty cycle you get about 4 hours of run time before a bead change is needed. but that under favorable air entering conditions.
desiccant does not last as long as most people think .
if I bought again I d get the bigger version of the drier the @ds690 recommended whish hold twice the beads, XL model.