Harvia WHP500M - Sauna Wood Stove Chimney Extension, 500mm, Black SteelDescription The black powder coated steel makes for a sleek addition inside or out. The joint mechanism and the supplementary parts are wound together while the smoke pipes are locked in place with grooves. These innovative attributes are how this Harvia 500 mm black steel chimney extension prevents movement caused by temperature changes. Features Innovative design Black powder coated steel Prevents movement caused by temperature changes Can be