Harman Mark III Ceramic Glass Panel (8 1/2" x 4 1/2") is the OEM-correct replacement designed to handle the intense heat of a real wood-burning stove. This pyro-ceramic glass is built to withstand temperatures up to 1,400°F, delivering a clear, sharp flame view without warping, clouding, or cracking under pressure. Made in the USA, it restores both safety and performance while bringing your fire back into crisp focus.
Unlike tempered glass—which is unsafe for wood stoves—this Harman ceramic glass panel is engineered specifically for high-heat firebox environments with minimal thermal expansion and long-term durability. It’s a precise fit for Harman Triple Frame, Magnafire Elite, Mark II, Mark III, SF-150, and SF-250 wood stoves, ensuring reliable operation and a clean, unobstructed view of the fire. Tape gasket sold separately.
Measurements: 8 1/2" x 4 1/2"
Glass Type: Pyro-ceramic glass (Pyroceram / Robax equivalent)
Thickness: 3/16" (5mm)
Operating Temperature: Up to 1,400°F / 760°C
Color: Clear (ceramic glass has a transparent amber tint)
Compatibility: Harman Mark III, Mark II, Triple Frame, Magnafire Elite, SF-150, SF-250
Part Number: 3-40-450850
If your glass panel is rare or no longer in production, I can create a custom-cut ceramic glass perfectly sized to your specifications.
➡ Order here: Custom-Cut Ceramic & Tempered Glass
Your Harman Mark III deserves a clear, brilliant view—let’s bring your fire back to full glory.
📦 FREE Shipping: Lead Time 3-5 Business Days
Harman Mark III Ceramic Glass Panel (8 1/2" x 4 1/2") is the OEM-correct replacement designed to handle the intense heat of a real wood-burning stove. This pyro-ceramic glass is built to withstand temperatures up to 1,400°F, delivering a clear, sharp flame view without warping, clouding, or cracking under pressure. Made in the USA, it restores both safety and performance while bringing your fire back into crisp focus.
Unlike tempered glass—which is unsafe for wood stoves—this Harman ceramic glass panel is engineered specifically for high-heat firebox environments with minimal thermal expansion and long-term durability. It’s a precise fit for Harman Triple Frame, Magnafire Elite, Mark II, Mark III, SF-150, and SF-250 wood stoves, ensuring reliable operation and a clean, unobstructed view of the fire. Tape gasket sold separately.
Measurements: 8 1/2" x 4 1/2"
Glass Type: Pyro-ceramic glass (Pyroceram / Robax equivalent)
Thickness: 3/16" (5mm)
Operating Temperature: Up to 1,400°F / 760°C
Color: Clear (ceramic glass has a transparent amber tint)
Compatibility: Harman Mark III, Mark II, Triple Frame, Magnafire Elite, SF-150, SF-250
Part Number: 3-40-450850
If your glass panel is rare or no longer in production, I can create a custom-cut ceramic glass perfectly sized to your specifications.
➡ Order here: Custom-Cut Ceramic & Tempered Glass
Your Harman Mark III deserves a clear, brilliant view—let’s bring your fire back to full glory.
📦 FREE Shipping: Lead Time 3-5 Business Days
