Harken 60mm Single Element Block Mastbase w/Swivel [6220] Winterizing | De-icers The innovative SuproFlex series is

The innovative SuproFlex series is co-extruded vinyl that provides two levels of hardness – ensuring enhanced protection from impact

18" wide covers a 3x8 or a 4x8 board

Use with MPS-RGBWWS4 (sold separately)

an operating frequency of 28 to 60 kHz and 150 to 250 kHz

Three-stage charging

Harken 60mm Single Element Block Mastbase w/Swivel [6220] Winterizing | De-icers The innovative SuproFlex series is60mm Single Element Block Mastbase with Swivel Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust. Elements design pairs the minimum amount of metal required to protect the sheave with a proven journal bearing. So size for size, Element is priced significantly lower, than our previously least expensive blocks. Sideplates are hardcoat anodized to resist