Ronstan Series 50 All Purpose Block - Single - Universal Head Boat J/80 and detailed weather reports sent

and detailed weather reports sent directly to your smartphone via satellite

Ball bearing swivel bases feature dual rows of Delrin¨ ball bearings that swivel freely even under high loads

Compatible with Uniden MRN-GPSK GPS Receiver

Connects up to 15 OLAS Transmitters (OLAS Tags or OLAS Float-On)

Recommended fasteners - 3 x 4mm (5/32") countersunk head screws

Ronstan Series 50 All Purpose Block - Single - Universal Head Boat J/80 and detailed weather reports sentSeries 50 All Purpose Block Single Universal Head All purpose (AP) blocks are a great all around solution. Self lubricating Acetal polymer sheaves running on polished stainless steel races perform equally well with dynamic loads and high static loads. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing. Captive Lock universal head can be fixed in either of