Just because they have tie rod bolts does not necessarily mean they are pneumatic.
I've worked with hundreds of hydraulic cylinders that are constructed that way for easy maintenance and/or modification to stroke length. The bolt on face/mounting plates can be bought in almost any configuration for different applications. They have like 25 different styles of mounting plates for your application. I use them for industrial plastic injection molds which need to be customized and modified all the time. The welded end cylinders used on our tractors are more for space saving than anything else, and mostly use tie rod or clevis ends. So they don't have to be as versatile in their mounting applications. They are also less prone to catching a moving hydraulic line without the square ends like that but those will surely work.
Not only that, I used tie rod bolted cylinders for my grapple. They work great.
If those are rated for your tractor system pressure, probably 2500psi, they will work. They look like Miller hydraulic cylinders to me. If they are, they are American made and are one of the best made at that. They are not cheap neither. Most are either 3,000 psi or 5,000 psi rated with a shock load of double that. See if you can get a close up of the name brand and the model.
Here is a link to Miller FluidPower.
Miller Fluid Power Products
If they work and fit your application, and you can get them for a bargain, go for it.
