Ronstan Orbit Blocks - Series 125 - Single Block shower box With different contact hole sizes

With different contact hole sizes to prevent reverse polarity contact

Twin non-counter rotating outboard installations to 300HP maximum

The GPS Speed reading never needs calibration and is more accurate than the paddle wheel

Large Fin - 2 studs 160mm apart - Blade 270mm x 170mm

Ronstan Orbit Blocks - Series 125 - Single Block shower box With different contact hole sizesThe highest strength to weight ratio Minimal friction loss, especially when working at high loads Totally reliable and trouble free performance Simplicity of design and construction to facilitate maintenance and servicing Elegant, functional styling and finish Orbit blocks are a no compromise product range developed to meet the demands and expectations of the very dedicated and increasingly professional racing sailor. Side cheeks incorporating head