4/8pcs Plexiglass Oilers M4 Brass glass Thread for Steam Stirling Engine Models

8pcs - Brass and Glass Oilers (M4 Thread). 4pcs - Brass and Glass Oilers (M4 Thread). Brass and Glass Oilers for Steam Engine Models. Threaded Connection – Equipped with an M4 thread at the bottom, suitable for screwing onto bearing blocks, cylinders, or eccentrics.

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