These Viadana 38mm Standing Blocks will accept lines/sheets to 3/8” diameter. These smooth ball-bearing blocks swivel and come with the pad eye base for attachment—good performance at a low price...
Comes with manufacturer two-year warranty
Material - Inox
Min line size - 3mm / 1/8"
Max line size - 6mm / 1/4"
Hole Spacing - 46mm / 1 13/16"
Hole Diameter - 4mm / 5/32"