1. Frame: long-frame:metal; short-frame:plastic.
2. Rubber: single-edge; multi-edge.
3. Pc backing.
4. Color: black.
1. 10'/250mm. 2. 11"/280mm. 3. 12"/300mm. 4. 13"/330mm. 5. 14"/350mm. 6. 15”/380mm. 7. 16”/400mm. 8. 17”/430mm. 9. 18”/4500mm. 10. 19”/480mm. 11. 20”/500mm. 12. 1set=2pcs/blister card packing. 13. 50set/ctn.