What ceramic fiberboard is more suitable for fireplace insulation?

I received an inquiry from Mr. Alan about 1000 * 500 * 30mm ceramic fiberboard in July and I replied Alan immediately after receiving his email.

Ceramic Fiber Board Insulation - 2300F Rated - 1 x 19.7 x 39.4 - Pack of 1 - Ceramic Fiber Thermal Insulation Board for Wood Stoves, Ovens, Forges, Kilns, Furnaces, Fireplace

Ceramic fiber boards, Aluminum silicate wool boards

Simond Store Ceramic Fiber Insulation Board, 2300F, 1/2 inch X 19.7 inch X 39.4 inch, Ceramic Thermal Insulation Board for Wood Stoves Fireplaces Furnaces Forges Kiln Pizza Oven

Simond Store Ceramic Fiber Insulation Board, 2300F, 1 Inch X 12 Inch X 12 Inch, Ceramic Thermal Insulation Board for Wood Stoves Fireplaces Furnaces Forges Kiln Pizza Oven

China Customized Inorganic Ceramic Fiber Board For Insulation Suppliers, Factory - Wholesale Price - SOARING

Simond Store Ceramic Fiber Insulation Board - 2300F Rated - 0.47 x 12 x 12 - Pack of 1 - Fireproof Refractory Ceramic Fiber Board for Stove Pizza Oven Furnace Kiln Fireplace

3mm 4mm 5mm 6mm 8mm 10mm 12mm 15mm 20mm Alumina Silicate Refractory Fire Proof Ceramic Fiber

Simond Store Ceramic Fiber Insulation Board, 2300F, 1 Inch X 12 Inch X 12 Inch, Ceramic Thermal Insulation Board for Wood Stoves Fireplaces Furnaces Forges Kiln Pizza Oven

China Customized Inorganic Ceramic Fiber Board For Insulation Suppliers, Factory - Wholesale Price - SOARING

Materials used to line fireboxes - a test

Stove Boards & Hearth Pads: The #1 Stove Board Dealer

Curing Ceramic Fiber Board

China Refractory Ceramic Fiber Board Manufacturers, Suppliers - Factory Direct Price - LUYANG

UniTherm Ceramic Fiber Insulation Blanket Roll 8#Density 2600F 1 in. x 24 in. x 60 in.

An overview of refractory ceramic fibers