EPDM Silicone Rubber Gasket for Iris Damper. Wide Size Range: Available sizes from 80mm to 1600mm including 100, 125, 160, 200, 250, 315 etc. Multiple Shape Options: Typical shapes include F, E, U, T, L, O, and custom profiles for various applications. Superior Aging Resistance: Features better aging resistance ensuring long service life for ventilation systems. Anti-friction Treatment: Surface treated to reduce friction for smooth operation in dampers and ducts. Diverse Application Scope: Suitable for spiral duct fittings, bends, reducers, iris dampers, fire dampers, and more. Custom Standard and Nonstandard: Manufactured to meet both standard specifications and custom nonstandard requirements. Fast Off-Season Delivery: Lead time within 15 workdays during off-peak seasons. Flexible Payment Terms: Accepts T/T payment terms for secure and convenient transactions.