Swarovski Mixed Round & Shaped Flatbacks No-Hotfix. These Flat Backs can be easily applied to a variety of carrier materials using standard one- or two-components glues. Shaped Flatbacks x 10 pcs. Model#: 2058 XILION / 2303 Pear Drop / 2204 Pure Leaf / 2304 Raindrop / 2494 Starlet.