HARKEN Element Block | Premium Sailing and Sailboat Equipment Element blocks introduce sideplates that combine forged aluminum and compound curves for strength Sideplates are hardcoat-anodized to resist corrosion. CDI Electronics CDI Electronics 193-4204 Voltage Regulator 4/6 Cyl ., 10 amp Write a Review $105.28 SKU: 193-4204 Quantity: Add To Quote Add to Wish List HARKEN 60mm Aluminium Element Double Footblock (6271) | Boat Warehouse... 80 mm Aluminum Element Double Footblock A tough composite bearing sheave resists corrosion for a long service life. Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing Harken Element 80 Mm Aluminum Block – Swivel #6290 - US