Barton Marine Size 5 Vang Tackle 4:1Barton Marine Size 5 Vang Tackle 4: 1 is a reliable upgrade for your vang system or a dependable boom preventer for boats up to 35' (10. 7 m). It combines quick deploy snap shackle fixings with professional splicing for straightforward, on deck sail control. Mechanical Advantage: 4: 1 for smooth, powerful vang operation with reduced effort. Line Length: 40' (12. 2 m) of 3 8" (10 mm) braided polyester line provides ample length and durability for