![[HK-2655] HARKEN 40 mm Fiddle Block — Swivel](http://www.yachtparts.com.au/cdn/shop/products/2655_3f5dba75-78c4-4231-84ea-de5dbd6a20d4_1024x1024.png?v=1554367352)
![[HK-2655] HARKEN 40 mm Fiddle Block — Swivel](http://www.yachtparts.com.au/cdn/shop/products/2655_3f5dba75-78c4-4231-84ea-de5dbd6a20d4_480x480.png?v=1554367352)
Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken® Black Magic® line, these small, compact blocks have very high working loads for safe, easy trimming. The 40 mm fiddle is an excellent choice for 3:1 and 4:1 tackles on dinghy vangs and mainsheets, as well as for controls such as cunninghams and internal boom outhauls on larger boats.