The Barton Size 1 Upright With Fairlead Block is designed for small to mid-range vessels and comes with nylon sheaves suitable for all ropes, including braided dyneema. Newly designed for 2019 onwards, the Barton Blocks are known as great value for money and practical for many applications. For racing applications consider getting the ball bearing versions.Barton Size 1 Blocks suit outhauls, downhauls, and kickers for smaller dinghies, including Laser, Topper, and Optimist boats.The 30mm sheave Size 1 block range is designed with an internal steel frame for added strength and durability. Available in plain and ball bearing sheave options, the lightweight modern design is available in variations that allow for a multitude of uses on every size craft.SpecificationsWeight: 70 gDimensions: 65 47 44 mmSize: 1 (30 mm)Block Type: UprightNumber of Sheaves: SingleBearing Type: PlainSheave Size: 30 mm 12 mm (1 3/16″ 15/32″)Max Rope Diameter: 8 mm (5/16″)SWL (Safe Working Load): 355 kg (782 lbs)Break Load: 710 kg (1565 lbs)Max Rolling Load (Ball Bearing Blocks): 245 kg (540 lbs)Brand: BartonDownloadSize 1 Block Range .input-wrapper a { text-decoration: none; / Removes underline / background-color: transparent; / Ensures no background color / } .input-wrapper a:hover { text-decoration: underline; / Adds underline on hover / background-color: transparent !important; / Removes grey highlight / }