A boro mod is a box mod designed around the Boro tank format — a rectangular, slide-in tank that sits inside the mod body. Originating from the Billet Box platform, the boro format is now the most popular form factor in the rebuildable scene, offering all-day liquid capacity in a compact, pocket-friendly package.

The boro ecosystem at 2FDeal also includes:

• Boro RBA bridges — SXK, 5AVape, ULTON, and other brands
• Boro tanks — glass, PCTG, and PEI options
• 510 adapters — convert your boro mod to standard 510 atomizer use
• Replacement and upgrade parts

Using a boro mod with a bridge + boro tank gives you RDA-level flavour in a compact, spill-resistant package. The boro tank slides into the mod body — no glass tank exposed, no leaks in your pocket.