F Attachment Tenor Trombone with an Axial (Thayer) valve. I've had this trombone for around four years now and hoping to sell it off to get a King 2B as a replacement.IMPORTANT: it works, however the slide pipes needs repair, as it disconnects from the trombone if the slide is not sleeved as you can see in the pictures, it still is playable however as its just an adhesive issue connecting both slide pipes; and when you reconnect them, pressure builds up at the connecting point and you need to release it to get the slide to fully operate. Another issue is the F attachment valve is extremely sticky and also needs a repair if you can't loosen it yourself, as you cannot use it without it sticking. I have no idea the make or model of the trombone, im assuming its a chinese version of the Bach stradivarius, as many have recommended when looked at.Comes with the original case which is also nice quality, as well as two other lead pipes to adjust the fit of the trombone.