Barton Single Block is suitable for the 2 x Topper Downhauls Blocks attached onto the carbine hook at the bottom of your downhaul. Topper or Topaz Downhaul Block with 20mm sheave for use as a micro block around smaller pleasure dinghies. Suits up to 5mm rope. This block can replace many pulleys on different dinghies, such as the block on the Laser Kicker.For use with the Topper or Topaz Dinghies, this block is one of three identical blocks in a 6:1 purchase Topper Downhaul. 2 of them connect to a carbine hook, which anchors the blocks on the mast, while one attaches to the webbing loop at the bottom of the sail.The 20mm sheave Size 0 block range is available in plain and ball bearing assembly. Engineered for dinghy sailors and small craft enthusiasts, the series defines high strength, keen performance, and lightweight design for racing and day boats. Also ideal for lead blocks, flag pennants, and small line systems on larger yachts.SpecificationsWeight: 15 gDimensions: 39 21 16 mmSize: 0 (20MM)Block Type: Fixed EyeNo. of Sheaves: SingleBearing Type: PlainSheave Size: 20mm x 8mm (25/32″ x 5/16″)Max rope diameter: 6mm (1/4″)SWL: 275kg (606lbs)Break load: 550kg (1210lbs)Max rolling load:(ball bearing blocks) 130kg (286lbs)Brand: Barton .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 / }DownloadFact Sheet .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 / }