Cinder Screens help control air flow and reduce the amount of cinders venting out the stove pipe. Every stove purchase includes a pair of Cinder Screens for the Box Stoves and the Cylinder Stove. Purchase and extra set here or replace lost Cinder Screens. – Use to control the rate of burn & cinder output – Sold as a pair – Cinder Screen diameter for our Medium Stove: 3.5? – Cinder Screen diameter for our Large Stove: 4? – Cinder Screen diameter for our Arctic Stove” 6? – Cinder Screen diameter for our Cylinder Stove: 3.125?