Extremely lightweight, Lewmar's 40mm Synchro blocks are ideal for use with hand-held loads and feature lightweight, performance load-bearing capacity. MRT (Metal Replacement Technology) and a stainless steel central race and balls provide a weight advantage, while Long Fibre Technology offers exceptional strength and durability. The open design allows sand and salt to be flushed out easily, keeping maintenance simple.
• Higher efficiency for faster sail handling and less rope wear
• High load bearing capability
• Cheeks use long fiber technology giving strength and durabiltiy
• Lightweight and impact Resistant
• Post diameter single/double block is 5/16" (8mm), triple block is 7/16" (11.5mm)
• Max pin diameter single/double block is 5/32" (4mm), triple block is 1/4" (6mm)

Ball bearing blocks are typically used for medium and dynamic loads in:
• Control line applications
• Mainsail sheets for dinghies and keelboats
• Spinnaker sheets, barber haulers
• Genoa sheets
• Dinghy applications