Conti GP 4000 tub, 22mm so quite narrow, certainly narrower than conventional wisdom would have you believe you should be riding. I purchased it 2nd hand for an on the bike spare when I used to ride tubs (idea was it would save me having to call my spouse if I got a flat). I never had cause to use it and have sold my road tub wheels. Includes the arundel tubi [that’s what they call it] bag, which is designed to carry a tub, see photos. Does not include saddle and seat post in final photo, that’s just to show how bag mounts.
eBay