Micro blocks are small, lightweight, free running blocks. They are ideal for use on sailboards, smaller dinghies, and for lightly loaded control lines on boats of all sizes. Compact self-cleating tackles can be made using the Micro fiddle with smoothly rounded V-Jam to protect line, or the triples with cams. 1/4 in LINE, MWL 350#, BS 1200# WT. 2OZ SHEAVE 7/8