This is a pair of additional rollers (R8212) for Hornby's Rolling Road (R8211) to facilitate the running of locomotives with 8 drive wheels rather than the original 6 as sold. They are brand new, unused and still sealed in the original pack. However the pack has been trimmed, presumably for storage purposes, by the cutting off of the top of the card! This has not affected the integrity of the bubble. Please study the photographs as they are an integral part of this description. Please also see my other items for sale. Thank you.