Ronstan Series 50 AP Fiddle Utility Block - Universal Head Rope Size:10 mm It combines extra coarse (XCS)

It combines extra coarse (XCS) silicon carbide mineral with open web

Resists most liquids

Permanent bonding - above and below the waterline

a leading cause of hard starting and battery failure

It maintains its flexibility and strength

Ronstan Series 50 AP Fiddle Utility Block - Universal Head Rope Size:10 mm It combines extra coarse (XCS)Ronstan Series 50 All Purpose Fiddle Utility Block, Universal Head RF51500 Exceptionally high working loads Low maintenance, long service life Self lubricating Acetal polymer sheave ensures low friction and extreme durability Captive Lock universal head Slotted pin shackle eliminates fouled lines Applications Mainsheet and halyard applications, vang and spinnaker control lines on boats to 10m (33ft) S60 on boats up to 12m (40ft) Ideal for fine tune