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These high load ball bearing blocks have steel sides for strength.
They are ideal for halyards, tackles, runners in a dynamic, low load situation.
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Seldén BBB25 High Load Block 402-201-10R is the triple-sheave version of Seldén’s compact 25 mm high-load ball-bearing block range. Stainless-steel side plates provide strength and stiffness, while stainless-steel ball bearings and lightweight bearing cages help keep friction low. Seldén lists BBB25 blocks for halyards, tackles and runners. The three-sheave arrangement suits compact multi-part purchase systems where several line parts need to pass through one fitting. Check line size, load and attachment geometry before installation.
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