Custom Various Rubber Oil Seal NBR Ffkm FKM FEP O-Rings Food Grade Silicone O Seal Ring. Extensive Material Selection: Available in NBR, EPDM, Silicone, FKM, Neoprene, and more for diverse applications. Custom Size & Color: Sizes and colors fully customizable to meet specific project requirements and standards. Lifetime Mold Storage: Mold fees collected once only; molds are saved for lifetime reuse by the customer. Food Grade Options: Silicone and other compounds available with KTW, WRAS, and ACS food safety certifications. Fast Sample Lead Time: Samples delivered in 8 days; mass production takes 12-18 days after approval. High Production Capacity: Monthly production capacity exceeds 1500 tons of rubber materials. Strict Quality Control: 100% visual inspection, third-party inspections accepted, and pre-production samples provided.