This is a package of eighteen 4mm Double Blocks from Latina. FEATURES: Constructed of wood and used in the rigging of model ships INCLUDES: Eighteen 4mm Double Blocks from Latina REQUIRES: Rigging thread SPECS: Height: 0.12" (3.1mm) Length: 0.16" (4mm) Width: 0.098" (2.5mm) COMMENTS: Also available in the following sizes; 3mm LATB8519, 5mm LATB8521, and 7mm LATB8523. jxs 5/15/06 ir/jxs