Poulie aluminium NMP-S - diam 15 - Tye Tec.
Poulie aluminium NMP-S - diam 15 - Tye Tec.

NMP Sail Block - For 8mm rope

Part #NMP-S381515


The NMP-S Block will be used for the mainsail reef.
Its feather weight combined with a huge MWL make this the ideal block for this use.
The NMP-S block also has an additional slot for attachment flat on the sail.
Dyneema® webbing is used to attach it to the sail. A little hand stitching through the outer slots will prevent the block from turning. The webbing should not be sewn closer than 2 x B to the block to lower the compression force.


Reefing blocks

Technical information

  • Materials Anodised aluminium
  • Length (mm) 48
  • Working load (kg) 1600
  • Weight (g) 18
  • B (mm) 15
  • d diameter (mm) 15


Working load (WL) : for nautical applications

Working Load Limit (WLL): for industrial applications only.
The safety factor is 5 times the breaking load.
WLL = Breaking load / 5