Extend your set in easy steps by adding Track Packs and TrakMat Accessory Packs all the way to the full layout pictured on your TrakMat scenic underlay sheet. Add Extension Pack B to the Starter Oval and Extension Pack A to make this layout.Track Extension Pack B contents: Straight track (R600) x 2; 2nd radius curve track (R606) x 1; Double curve 2nd radius track (R607) x 4; Right hand point (R8073) x 1; Buffer stop (R083) x 1.