This is a lot of 50 replacement o-rings for G.I. Joe and Cobra figures from the ARAH days (1982-1994). Have a nice figure that's just a little wobbly in the mid-section? Replace the o-ring and restore it to it's original tight condition! I've used several sizes over the past 20 years, but in my opinion; #41s are the best. They are strong enough to keep the figure tight, and flexible enough that they don't put a lot of pressure on the fragile plastic. The o-rings are buna nitrile and measure 9/16" OD, 7/16" ID and are 1/6" thick. These are brand new o-rings. Win/buy any 5 auctions/store items and get free shipping!(Domestic Only!)