Lewmar's Synchro footblocks use Alloy cheeks, fixing isolators and to prevent sealant from getting into the sheave, a moulded base plate. All 3 sizes are available in standard and jamming formats and can be stacked to form a double footblock.
The smaller 40mm control line footblocks come with a stainless steel base plate and can be used as miniature organisers or deflectors for lines being returned to the cockpit.
Lewmar's Synchro footblocks use Alloy cheeks, fixing isolators and to prevent sealant from getting into the sheave, a moulded base plate. All 3 sizes are available in standard and jamming formats and can be stacked to form a double footblock. 
