We are considering a reducer replacement for [machine]. Original model/serial: [details / unknown]; drawing: [number/revision]. Exact ratio, input/output speeds and direction, normal torque and starting/reversing/shock conditions are [known details / gaps]. The attached drawing identifies mounting faces, shaft geometry/positions and external components with load application points. Please state the candidate model, load suitability, orientation, lubrication/cooling requirements and dimensional differences. Separate base, connection parts, machining and installation scope from open questions in your quotation. Selection proceeds after machine-side approval; please identify conditions needed for operating verification.