The Na Grani Heat Management Device aka 'Over The Edge' is made completely from 1 piece of AISI 304 stainless steel. 

The Na Grani HMD has a raised section within the coal area to aid airflow as well as several holes so heat reaches your shisha tobacco evenly and stop coals.

- HMD Diameter Surface Touching The Bowl - 7.4 cm
- Inner Diameter - 5.6 cm

- Depth - 2.4 Cm

- Weight - 160 grams