The PROVOST Heat Management System by APPLE ON TOP is a stainless steel heat regulating device for natural shisha coals. It is a closed system like the KALOUD LOTUS. The PROVOST Heat Management System allows you to prolong your sessions thanks to a rotating system that regulates the air flow and therefore the heating of your hookah. The PROVOST system by APPLE ON TOP is compatible with most shisha bowls. The PROVOST Heat Management System is ideal for outdoor shisha sessions. We recommend that you place aluminium foil under the PROVOST Heating Management System for optimal use.