Types: 3M 5M 8M XL S3M S5M S8M. S3M (Pitch: 3 mm), S5M, S8M (Pitch: 8 mm), XL( Pitch: 5.08 mm). HTD-8M (Pitch: 8 mm), HTD-5M (Pitch: 5 mm), HTD-3M (Pitch: 3 mm). The product is made of thermoplastic polyurethane (PU) material with steel wire inside, A layer of green cloth is attached to the tooth surface.
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