SYRINGES, 12 Pack, for epoxy and glues by WEST SYSTEM

How much volume can these can hold? 1oz? More? Less?

how many syringes come in one order?

If using these for caulk, how do you get the caulk into the syringe?

So for epoxy, do you use a pair of syringes to draw part A and part B respectively, or do you simply mix both parts, then draw the whole mixture?