Clay flues

CF15
Ext. Size	Int. Size	Height
25 x 25	15 x 15	25 cm

CF23
Ext. Size	Int. Size	Height
30 x 40	20 x 30	25 cm

CF40
Ext. Size	Int. Size	Height
50 x 50	40 x 40	25 cm

2-hole flue
Code	Ext. Size	Int. Size	Height
CF2F	25 x 50	15 x 40	25 cm