Hi, ceilsan32! I'd be happy to answer your questions.

The Glass:
The glass for this model measures 8 1/4" (top) x 4 7/16" (bottom) x 8"H. The glass options include Clear Flat, Frosted, Beveled, Seedy, and Water Glass; however, the Seedy and Water Glass are not tempered, and therefore, can only be used with the electric models, not gas. The Clear Flat Glass is included in the price of the fixture. The Frosted Glass is a $24.00 upcharge for a set of 4 panes. The Beveled, Seedy, and Water Glass is a $48.00 upcharge for a set of 4 panes.

The Post:
We have both galvanized steel and aluminum posts available that are compatible with this fixture (and all others we manufacture). The posts are available in 7'9" to 12' lengths. The prices vary depending on which material, length, and configuration (for gas or electric) you choose, as well as whether or not you select a ladder rest. Our galvanized steel posts are available in 7'9", 10', and 12' lengths and range from $59.00 - $139.00. Our aluminum posts are available smooth or fluted, in 8', 9', 10', and 12' lengths, and range from $169.00 - $289.00. Additionally, the posts must be buried approximately 2' into the ground, so you will want to select a post length 2' longer than the height you want showing out of the ground. As an example, a 9' smooth aluminum post for use with a gas lamp and with no ladder rest (aka: cross bar) will stand approximately 7' out of the ground and is priced at $209.00. For use with an electric lamp, it is priced at $189.00. To add a ladder rest/cross bar, add $10.00 to either of those prices. If you have the specifications for the post you're interested in, I am happy to provide you with an exact quote for your specific project.

The Finial:
We have 13 different finial options available for this model lamp. The upcharge price for any finial other than the one pictured with the lamp is $10.00. The finial pictured with the lamp is included in the lamp price. The finials are made of brass plated, solid brass, or cast aluminum construction and are available natural or can be powder coated to match the finish you select for your fixture.

I hope this answers all your questions! Please feel free to contact us if you have any additional requests.

Thank you,
The American Gas Lamp Works Team