5/16" Duramax Ultra-X - 1 lb Pkg (13 ft)

Duramax Ultra-X is a unique high-performance, packing specifically engineered for heavy duty marine propulsion service. It features a unique and especially even distribution of encapsulated graphite and specialized lubricants into an expanded PTFE braided matrix.

Ultra-X doesn't insulate like flax packing - its excellent lubricity and high thermal conductivity keep shafts running cool at all speeds.
Ultra-X stays pliable, and never hardens or becomes abrasive - even at high shaft speeds.
While look-alike, black, pure PTFE products undergo thermal expansion - increasing friction and shaft scoring, Ultra-X is dimensionally stable, virtually eliminating costly damage caused by extensive shaft scoring and wear.

• Outperforms flax and competitors' PTFE packings
• Unlike flax packing, it is not consumed in use and is virtually maintenance-free; no need to monitor or adjust the gland or nut
• Use for stern tube, bulkhead, or rudder stuffing boxes
• Self-lubricating and conformable, easy to install and easy to remove after use
• Practically dripless - doesn't shrink or swell, keeps bilge drier and free of oily contaminants
• Only 1/3 the friction of flax, lasts over 5 times longer than other packing
• Priced and sold by the package (denominated in pounds)