Ronstan Track - Series 19 - Luff Groove Profile ronstan ball bearing utility blocks - series 15 - upright lead block - Removes fine machine polish

- Removes fine machine polish swirls effectively

Urethane Universal Joint

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positive positioning of track slides

welded at both ends and polished to perfection

Ronstan Track - Series 19 - Luff Groove Profile ronstan ball bearing utility blocks - series 15 - upright lead block - Removes fine machine polishPatented system uses low profile cars running on twin races of acetal ball bearings. Cars use the existing luff groove of the mast (no track or installation work required). Ball bearings are captive for easy loading and unloading of cars from mast. They can be easily switched between fully battened and soft luff mainsails. Minimum distance from mast to mainsail luff enhances mainsail efficiency. With a complete range of car profiles and feet there is