Ronstan's Series 50mm 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. They have impact and UV-resistant reinforced Nylon cheeks and a grade 316 stainless steel load strap. For durability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing on boats up to 33 in (10m).
hese stand-up blocks are typically used in direct 4:1 purchase systems such as mainsheets and boom vangs. On larger boats they are used for fine-tune mainsheet tackles, outhauls, cunninghams, checkstays, genoa lead pullers and traveler controls.
|Breaking Load (lbs)||3310|
|Breaking Load (kg)||1500|
|Safe Working Load (lbs)||1650|
|Safe Working Load (kg)||750|
|Sheave Diameter (in)||2|
|Sheave Diameter (mm)||50|