Seaway Vang Blocks - 7/16" Line - Catalina 30Seaway Vang Blocks 7 16" Line . All block sheaves have the edging cracking appearance. Still has some life left. Removed off a catalina 30. 2 single blocks with a 2 1 2" diameter sheave. Another single the same size that has a Beckett. Smaller single block with a 1 1 2" diameter sheave fiddle block and fiddle block with a cam cleat (sticks a little) 2 1 2" & 1 1 2" sheaves