We are considering a replacement coupling for [machine / drive]. The original model is [code / unknown]; shaft drawings are [numbers / revisions]. Attached drawings identify shaft diameters, keyways/D-flats, usable lengths and attachment. Normal torque/speed and starting, reversal and braking duty are [known conditions / unknowns]; environment is [temperature / exposure]. Please state the full candidate code, shaft-attachment requirements, continuous/peak torque conditions, speed capability, and treatment of combined misalignment and axial movement. Identify insertion lengths, shaft-end spacing, rotating envelope, included parts, machining and inspection scope. Separate deviations from the original and outstanding unknowns. Please quote with lead-time assumptions; manufacture is to proceed only after machine-side approval of the proposed selection.