Specification: flexible, durable, bearing corroding, heating resistant, compression-resistance, torsibility, meanwhile it can reduce the noise. Type: 1. Ym-brq-10-sm30x2-r1/2 Dn10 2. Ym-brq-15-sm30x2 Dn15 3. Brq-18-sm30x2-r1/2 Dn18 Usage: gas oven & gas instruments&appartus.