This is .010" thickness

Vegetable Fiber is used in automotive, small engine, and compressor applications. Gas, oil and water, it is one of the oldest and most reliable materials still today.

Spec sheet below

2 sheets of material. Each sheet is approx. 9-1/2" x 14" in excellent condition. Superior material and used hugely in industrial manufacturing of internal combustion engines.

Vellumoid 505 Fiber is a general-purpose cellulose fiber gasket material impregnated with
a protein and glycerin binder. It has exceptionally good sealing properties, is highly
conformable to compensate for distortions in flanges and is an economical solution for
many sealing applications. It is chemically inert in the presence of petroleum lubricating
oils, automotive gasolines, fuel oils and many organic solvents. Vellumoid 505 Fiber
provides excellent service in moderate duty, general-purpose applications at temperatures
up to 250F.

MATERIAL SPECIFICATIONS - Typical Values (.010”)

Compressibility @ 1000 psi (6.89 MPa), % 25-40
Recovery, minimum % 40
Tensile Strength, minimum psi. (MPa) 2000 (13.79)
Fluid Immersion
ASTM Ref. Fuel B
Thickness Increase, % 5
Weight Increase, % 15
ASTM Oil No. 3
Thickness Increase, % 5
Weight Increase, % 15
Distilled Water
Thickness Increase, % 30
Weight Increase, % 90