Harken 16mm Thru-Deck Block allows control lines to run through the deck or bulkhead.

16mm Blocks have a lightweight design and a unique patented bearing system which uses stainless steel balls in a captive, grooved race. Very high working loads in an extremely lightweight block, with the best strength-to-weight ratios around. Use with small synthetic control lines found on high-tech dinghies. 

• Very high working loads in an extremely lightweight block
• Lightweight design and a unique patented bearing system
• Stainless steel ball bearings
• Sheave Diameter: 5/8" (16 mm)
• Max. Line Diameter: 7/32" (5 mm)
• Max. Working Load (MWL): 250 lb. (113 kg)
• Breaking Load: 1200 lb. (544 kg)
• Weight: .63 oz. (18 g)
• Length: 2 3/8" (60 mm)