Check the listing for details. Maxima Racing Oils SERENE Dropper Post Fluid 16 fl oz. Condition: New. Listed at 18.51 USD. High performance hydraulic fluid designed specifically for use in seat posts. The OEM-recommended formulation reduces friction, ensuring fast, quiet action with minimal drag. High viscosity index formulation ensures consistent drop and return speeds under all conditions. Proprietary additive system protects seals, minimizes wear and prevents corrosion, improving performance throughout seat post life.Formulated to reduce friction and drag. Consistent fast and quiet action. Resists fade to ensure consistent drop and return speeds. Protects components and ensures optimal performance throughout seat post life. OEM-approved and recommended. Item Specifications: Volume, 16, SHIPS TODAY! Order before 1:30PM EST, M - F, and this item ships the same day! HAVE A QUESTION?Expert customer service by bike experts! A Real Brick And Mortar Retail Bicycle Shop with people you can talk to! Contact Us! (9-5 Mon-Fri, 12-4 Sat & Sun EST) Chat With Us