Two NOS, unused KT88 or larger cloth mesh tube retainers for Marshall or other tube amps.  Outer basket diameter is about 2.5". Second photo shows one resting, untensioned, on a 6550.
Other sizes available.  

NOTE ON ASBESTOS
I have had several inquiries about whether these mesh tube retainers have asbestos in them.  This seemed like an odd request so I did some online research.  Apparently, there have been several people on various forums that have insisted that these "china hats" have asbestos, but none indicated that they had any knowledge of actual tests.  This kind of bothered me so I purchased an Asbestos test kit (Scheider labs) and sent a sample that was a mixture of the fibers from all the tube retainer sizes I have on ebay.  The test came back as "None Detected".  Bottom-line, it is hard to say if this style of retainer was ever made with asbestos in it, but the ones I have appear to be asbestos-free.  Not everything on the internet is true.

Will combine shipping on multiple wins when checkout is done together (add all items to cart, then check out).  Take largest base shipping charge and add additional item charges for other items.  If interested, I can send offer with this calculation.