Olive California Queen scion. 
The Californian Queen Olive is a very large table olive that is eaten green or black that was bred.

(Californian Queen) –  The UC stands for University of California which developed this olive. It has very large table fruit (~11.5g). It has good flesh to pit ratio, reportedly has excellent texture and flavour and is usually pickled green. If you like your olives big, this one is for you. Here is a comparative photo showing  how big the UC 13A6 is compared to Frantoio and Arbquina.  It is huge.

You can graft Californian Queen scion onto your olive tree...

All slices are covered by natural bee-wax.

All cuttings are wrapped by wet paper and plastic for evaporation protection.

All cuttings are cut in my garden just after your order and they are wrapped immediately.

I would recommend to all my buyers to use a Rooting Stimulator, which you can order - https://www.ebay.com.au/itm/336354988611. 
It will help you get better rooting, faster plants growing, scion survival rate and accelerate getting your first harvest.