I have more of these available. If you need more email me. 

Series 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 two planes, or free to swivel as required

Features:

Exceptionally high working loads

Low maintenance, long service life

Self lubricating sheave

Captive Lock™ universal head

Slotted pin shackle eliminates fouled lines

Applications:

Mainsheet and halyard applications, vang and spinnaker control lines on boats to 10M(33')

Materials:

Nylatron® sheave

Grade 316 stainless steel load strap and head fitting

Impact and U.V. resistant, fiber reinforced Nylon cheeks

Specifications:

Sheave Ø:50mm(2)

Max. Rope Ø: 12mm(1/2)

Max. Pin Ø: 5mm(3/16)

M.W.L.:750kg(1,650lbs)

B. L.:1,500kg(3,310lbs)

Weight:118g(4.1oz)