Various types of national standard rubber test molds:1. [GB/T1681 National Standard] Rubber rebound test sample mold2. [GB/T13934-2006 National Standard] Rubber Crack Fatigue Test Mold3. [GB/T1689 National Standard] Rubber Akron Wear Rubber Wheel Mold4. [GB9867, ISO4649, and DIN53516 national standards] Rubber drum wear test piece mold5. [GB/T528-92 National Standard] Rubber Tensile Test Piece Mold6. [GB/T531 National Standard] Rubber Hardness Test Piece Mold7. [GB7759.