flange rubber joints: 1. Body (Outer Layer & Inner Layer): EPDM NBR and Neoprene Rubber 2. Reinforcing Layer: Nylon Fabric 3. Wire: Stainless Steel Wire 4. Flange: Carbon Steel and stainless steel 5. Flange Drillings: BS, DIN, ANSI, JIS or others provided drawing samples More features and benefits: 1. Versatile hand-built construction. Made in China 2. Absorbs directional movement 3. Absorbs vibration, noise and shock 4. Compensates for misalignment 5. Wide flowing arch design 6. Virtually eliminates sediment buildup 7. Economical fully molded construction 8. High vacuum rating (up to 30" Hg) can be supplied for certain sizes 9. Special grooved flange ring design, prevent rubber end pull out 10. Solid galvanized steel floating flanges speed the installation time 11. High tensile aircraft cable is embedded in the raised face rubber ends to prevent pull out and avoids the sharp cutting edge of solid steel rings 12. No gaskets required; integrally rubber flanged design, no gaskets required, DIN PN10/16 drilling standard, other flange drilling available, including ANSI 150lb/300 lb, BS, and JIs Normally, the flange drilling is based on DIN PN16, ANSI 150/250/300 lbs, BS PN10, JIS 10K are also available upon request.