This is a package of eighteen 3mm Double Blocks from Latina. FEATURES: Constructed of wood and used in the rigging of model ships INCLUDES: Eighteen 3mm Double Blocks from Latina REQUIRES: Rigging thread SPECS: Height: 0.15" (3.75mm) Length: 0.12" (3mm) Width: 0.098" (2.5mm) COMMENTS: Also available in the following sizes; 4mm LATB8520, 5mm LATB8521, and 7mm LATB8523. kpm12/26/2006 ir/jxs