18/20 RMS
http://www.hobbay.com/auctiondetails.php?itemname ®rotech-Reloadables-RMS--1820-21-Reloads-In-All&id6
http://www.hobbay.com/auctiondetails.php?itemname ®rotech-Reloadables-RMS--1820-21-Reloads-In-All&id6
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