Envelope of 12 New drive bands for all (except 6830 non-operating version) Lionel submarines, 3330, 3820, 3830 and modern issues. Correct size as original postwar production. According to the original instructions Lionel subs 3830 and 3820 came with 12 spare drive bands in an unmarked envelope, the 3330 kit included them in the parts bag. 

You have your choice of the three envelope styles shown, just let me know which you prefer.....A, B, or C 
Sorry if the pricing seems high, but over 50% is gone to postage and fee's. Buy more than 1 and save.