30 mm Ball Bearing Block - Double, Through-Deck lead ø14 mm The block is designed for

The block is designed for 4:1 tackles on medium-sized boats and features acetal sheaves

thread size 7/8"

408-001-21R rotates clockwise when tensioning the line

Wire diam: 16 mm

this turnbuckle offers superior corrosion resistance and thread durability

30 mm Ball Bearing Block - Double, Through-Deck lead ø14 mm The block is designed forThe Seldn BBB30 Double TD block is a 30mm ball bearing block designed for leading a line through a coaming or deck. Made with stainless steel ball bearings and glass fiber reinforced polyamide, it is lightweight yet strong. Mounted with 2 M5 screws. Acetal bearing cage to prevent ball to ball friction and to reduce weight. Typically used to lead the 8 mm furling line of a Furlex 204TD from the anchor box installation through deck and back to the