Series 40 Ball
Bearing Orbit
Blocks™

These high performance 40mm blocks feature our 2-stage bearing system and are engineered to achieve the highest possible strength-to-weight ratio, Ronstan Series 40 Orbit Blocks™ are a popular choice on mainsheet systems and spinnaker sheets for dinghies up to 5m (16').

Featuring class leading strength, accommodating rope diameters up to 10mm, and available in 23 individual configurations, Ronstan’s new Series 40 Orbit Blocks™ are the most capable blocks of their size.