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

Input:
Question: Will this work to double stack half pint or pint jars in the presto 16 quart pressure canner Product # 1755?
Document: This product is a must for canners. It fits the presto pressure canner/cooker. I needed an extra one (one comes with the canner) so I could process a double amount of jars. You have one on the bottom (to protect jars during canning process) and then put the lid on a top of the first layer of pint/half pint of jars. Double stacking Quarts can only be stacked in a Taller/bigger Canner.
I don't know why I never tried a pressure canner before -- and using this second rack allows me to stack pint and half pint jars and reduce the amount of time I spend watching water boil (and cuts my energy usage too!). Great product - wish they included an extra with the canner!
I just needed and extra rack so I could double stack my pint jars safely in my presto pressure canner.
I bought this rack to use in my Victorio Vkp1054 Aluminum 7-Quart Steam Canner. The wire rack that comes with the canner causes pint and 1/2 pint jars to tip over. This canning rack is exactly the right size to fit over the existing rack and keep my jars from tipping. I do not know if it is safe to double stack jars in this type of canner. The rack may block too much steam for the upper row of jars.
Having purchased the Presto 23 quart pressure canner, I was thrilled to get this second rack to do the top layer of pint jars under pressure. It only can hold 20 pints if they are Ball brand. The off brand at discount stores can only hold 18 or so. Love this rack!
Exactly like the original. Very pleased with it. Now I can stack extra layer when canning pints and half pint jars.
I bought this for my Presto 23qt pressure canner. You really need a 2nd rack like this so that you can stack pints, half-pints, etc. It fits perfectly in my canner.
Not much to say about this canning rack. It's made from aluminum, of decent gauge metal and is sturdy. Allows those with a double stack canner to stack a second level of cans without worry of jars shifting.Pic of product:[...]
Very sturdy aluminum cooking/canning rack works great. I bought it because I wanted to have a spare base. I'm sure it would work well for stacking, but I prefer one with lift handles for stacking. I would recommend this product as it is well made and fits just right in the presto 23 qt. Pressure Canner/Cooker.
I can things in pint jars and wanted to can two layers of jars at the same time so bought the extra rack.I have the Presto 23 quart canner and it is tall enough for two layers. Not all canners are made for that.
Answer: Only for half pints.