Replacement Rubber for FMC Bean K Series 4" (SKU:303029), high-ACN NBR rubber (ACN≥36%) with sulfur vulcanization, hardness 70±5 Shore A, API 7K compliant, 50% higher wear resistance vs standard rubber (ASTM D5963), oil-resistant to ISO 1817 Class B, compatible with K series 4" bore pumps.
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