Swarovski rhinestones reference "SS20", a diameter of 5mm, Light sapphire color (a pretty light sapphire blue).
Strass heat-fixable ("hot-fix") with a simple iron or even easier, with the electric applicator.
Quantity discount: earn 10% by buying 5 bags (i.e. 60 rhinestones), or 15% by buying 10 bags (i.e. 120 rhinestones) or even better 20% by buying 20 bags (i.e. 240 rhinestones) - subject to stock availability.