The NA GRANI HMD is a Russian heating system designed for an "open" heating setup, i.e. without a top lid for Russian-style use.

The NA GRANI HMD shisha pipe heater is made of stainless steel and can be used with 2 to 3 coal cubes depending on the intensity you want. 

-Bottom diameter - 74mm

-Internal diameter - 56mm

-Depth - 24mm