Ronstan Series 50 BB Double Utility Block - Swivel Shackle Head (Non-locking) Polyurethane varnish It is light enough to

It is light enough to fly in the gentlest breezes and durable enough to last several months of continuous use

The clear acrylic lens breaks through the water surface reflection

Renews appearance of vehicles with a fresh

Suitable for use with manual or electric pumps

Ronstan Series 50 BB Double Utility Block - Swivel Shackle Head (Non-locking) Polyurethane varnish It is light enough toRonstan Series 50 Ball Bearing Double Utility Block, Swivel Shackle Head (Non locking) RF50200 Low friction, 2 stage ball bearing system High static and dynamic load capacity Lightweight Cheek cut outs for easy bearing maintenance Slotted pin shackle eliminates fouled lines Applications Mainsheet Spinnaker sheets Halyards and other primary applications on boats up to 10 m (33 ft) Materials Acetal ball bearings UV stabilised Acetal sheave Grade 316