19 In. Ventless Gel Fireplace Insert including 1 Crackling Flame Gel can. Turn almost any mantel into a beautiful and warm fireplace with this gel fireplace insert. Metal fire box Real heat, real flame No venting required Holds 3 canisters Uses convenient and easy clean burning gel fuel Measures: L - 32.0 W- 9.75 H -19.0 Used, but, in good condition. Motivated Seller.