On the vape cartridge is has 3x what does that mean

Coffee shop

1 Harvard St, Brookline, MA 02445, USA

Fitness center

279 Washington St, Brookline, MA 02445, USA

Toy store

19 Harvard St, Brookline, MA 02445, USA

Bed & breakfast

1750 Beacon St, Brookline, MA 02445, USA

Crêperie

278 Harvard St, Brookline, MA 02446, USA

Jewish restaurant

335 Harvard St, Brookline, MA 02446, USA

Grocery store

155 Harvard St, Brookline, MA 02446, USA

Park

575 Brookline Ave, Brookline, MA 02445, USA