Our alcohol burner is designed for use with any experiment requiring low heat. Almost every science class needs a small heat source. The polished metal alcohol burner is much safer than a glass burner. The flame can be easily adjusted by rotating the ratcheted wick control wheel. The air cap is securely attached to the burner by a matching polished chain. 4-1/2" x 3" x 4-1/2"; .5 lb;150ml capacity.