1. BOP Rubber coreis for sealing of BOPs in oil processing, well drilling, oil test, well repair, oil and gas well and well control at rated temperature of -26¡æ 149¡æ. 2. Applicable standard: API Spec 16A . 3. Sizes and models of ram type: 18-14, 18-21, 18-35, 18-70, 28-35, 28-70, 35-35, 35-70,54- 14. 4. SIzes and models of ring type: 18-35, 28-35, 35-35, 54-14.