Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: What is the interior height of this riser without using the adjustable shelf?
Document: The unit comes with one structural shelf and one adjustable shelf. Unfortunately, the product came with the holes improperly drilled. Can't use the adjustable shelf now.At $40 shipping, it isn't worth returning.
It's not fancy but it's solid enough to do the job well and looks good too. Simple style and design but has room inside the adjustable shelf side for my Onkyo TX-NR808 which is a big unit yet still has plenty of ventilation. The only thing I would like to see to dress it up a bit is some kind of back panel but if you stuff it full of equipment it makes little difference.
It is made from very heavy particle board that has a thin cherry veneer. While the veneer is attractive, I would prefer that the product be made from solid wood. Of course, then it would be more expensive, but then the fact that shipping was more than 50% of the purchase price would go away.The pieces fit together well and the adjustable shelf allowed me to put a sound bar subwoofer, a cable box and a blu-ray player in a compact space in a living room media cutout.
I bought this shelf to house my home theater devices & 55" flat panel tv. It works great!! The shelves are well made, super sturdy, & went together easily. For the price, looks & quality, I am very satisfied. Works perfect for what I intended it to do.
I got this to lower my 70&#34; tv to a better watching height. Before I had it on a regular entertainment center thats about 3 feet tall, and it was too high for comfortable viewing. This unit is just under a foot tall, bringing my tv to a good level when relaxing in my recliner. Although I think they could charge less for this as there are not many materials involved, it is a good low tv stand.
had a antique &#34;hope chest &#34; that was my Grandmothers, now it works great as an entertainment center..... great product
When finally assembled, the result looks like it was custom designed for this space.
Though this product looks good in the photo, buyers beware...you are looking at JUNK!! Every item is chipped, cracked, marked and scratched, and THAT is still in the box condition. Therefore, you know it was JUNK when before packing, JUNK after packing, and NOT  worth your money (HARD EARNED $$$)!! Save yourself the trouble, time, money (S&H also EXTREMELY HIGH) and headaches, Buy elsewhere other than OFC Express.
This is an all &#34;wood product&#34; item and as such, it is a touch heavy and bulky. However, it does exactly as it states and can hold internally 4 devices and a not too large LCD on top. Being with a 14&#34; depth, most devices will fit in properly ( AVR, DVR, disc players etc.
This fits my receiver, bluray, cable box and vcr. Yes, I still have a vcr. Thanks for making one big enough for all my stuff.
Answer: 10 3/4 inches