Hi Dave. I use a Coin Safe CS-43 round for my $10 strikes when I want them to not have any extra plastic. These caps are the same size as the old original $10 strikes used before 2005. Because strikes generally measure around 43.6 or so, you need to be aware that most other brands size 43 may actually be too small. Many of the collectors who don't like rings but want a slightly larger looking token that is more in line with how the new $10's get dispensed (more plastic of course) can get an Air-Tites 43X size. Depending on the quantity you need either can be ordered in a small box of 10 or in larger boxes of 200/250 from Air-Tites.com. This is where I order mine, but I am sure others can weigh in with what they do. Unfortunately, I haven't ordered $40 strike cases in a long time and cannot remember ordering size for them. Good luck.