Barton Marine Size 5 Vang Tackle 4:1Barton Marine Size 5 Vang Tackle 4: 1 is a high performance upgrade for your existing vang system or a reliable boom preventer on boats up to 35' (10. 7 m). Featuring quick deploy snap shackle fixings and professional splicing, this tackle delivers effortless sail control with dependable on deck performance. Key features Mechanical Advantage 4: 1 for smooth, powerful vang operation with reduced effort. 40' (12. 2 m) of 3 8" (10 mm) braided polyester