The Finned heat sink is very good to cool the huge vapor atomizer,  it is suitable for 510 thread RBA RDA Rebuildable Atomizer, 

510 Threading

Made from 303 Solid Piece Stainless Steel

PEEK Insulators

Pure Copper Pins/Contacts

Deep Heat Sinks

Maximum Heat Dissipation

Dimensions: DEPTH 13mm,Diameter 22mm ,WIDTH 22 mm

Product includes:

1x Heat Sink 

Warranty:  Only accept DOA, Please refer to Warranty Policy for details.