Universal Heat Shield Reflector for 4-sided glass tube heater Does NOT fit 3-Sided Glass Tube heaters Aluminum 1-PC Replacement Reflector for 4-Sided Glass-Tube Patio Heater Will Replace reflector tops for most major brands A Universal Fit for all 4-Sided Glass Tube Patio Heaters . 18.5 Inches x 18.5 Inches Rust Free &amp; Easy to Assemble