Grex A120004 - Packing seal (discontinued, use A120016) Grex from $3.35 $4.10 Qty. Out of Stock SKU: GRX-A120004 This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. This o-ring has been replaced by A120016 which contains both o-rings A120004 and A060002. Tweet