Taylor Mades Regulatory Bouys are crafted using a rotational molding process that imparts tremendous impact strength. The result is a UV-stabilized high-density polyethylene shells with uniform wall thickness free of internal stresses that in extreme temperatures often cause cracking over time. Available: Small Red Nun (not shown) Ht: 23.5. Max. Diameter: 13. Buoyancy: 40 lbs. Large Red Nun Ht: 48. Max. Diameter: 25. Buoyancy: 235 lbs. Red Sur-Mark Nun Ht: 49. Max. Diameter: 10(collar), 18(ring). Buoyancy: 40 lbs. Type: Dock Accessories.