28" galvanized blade with the angled offset tip that builds the full 73" OWS head — the longest in the industry. The extra blade length adds torque, which is what lets these mills turn in 3–5 mph breezes other windmills sleep through. Fits all OWS...

24" square-cut universal replacement blade in galvanized steel. Fits all OWS windmills; corrosion- and warp-resistant so the head stays balanced. Use it to restore a damaged head or replace a thrown blade.

18-gauge galvanized brace that keeps windmill blades aligned and rotation balanced. A missing brace is the usual culprit behind blade wobble; this universal part drops into any OWS head.

Weather-resistant galvanized replacement dome for OWS windmills. Installs quickly with the included self-tapping screws and keeps the hub protected from rain and debris.

OEM-spec galvanized ground stake clamps for OWS windmill towers, sold as a complete set of three pairs. Corroded or loosened clamps let a tower work itself unstable; a full replacement set restores factory anchoring. Made in the USA.

Replacement tower cone for OWS 3-leg large windmill towers. The cone is the transition piece at the tower top that carries the pivot tube; replace it if yours is damaged or lost in a rebuild.

Tower cone bushings for OWS windmill aerators and large yard windmills — the wear part between cone and pivot tube.

Self-cleaning EPDM rubber membrane diffuser on an integrated self-sinking base — no gravel, no added weights, just connect and drop. The membrane sheds buildup that clogs stone diffusers, keeping bubble output (and oxygen transfer) consistent with...

Drop-in 12" rubber membrane replacement for worn or aging diffuser discs. The low-PSI opening design releases maximum air without straining the windmill or pump, and the precision-slotted membrane resists clogging season after season.

The simple, budget-right diffuser for windmill and small-pond aeration: a self-sinking airstone that throws thousands of fine bubbles, with a foot valve for one-way airflow. No anchoring hardware or tools needed. Choose a single, or the double pack with...