Stainless Blocks Micro 17 are for general purpose use. They are economical, reliable and extremely versatile with a variety of head fixings and mounts, making them ideal for small rope applications. The hollow rivets on single versions accept the R6250 shackle for attachment or act as a becket, for greater purchase. All models have stainless steel bodies and hollow axles, and are maintenance free. Standard sheave is 'Acetal' high load self lubricating for conventional ropes up to 6mm. For harder Hl-Tech rope or wire applications the carbon filled or brass versions are well suited. The micro 'V' jammers are often used as the last block in 4 or 5mm rope tackles in confined spaces for outhauls and Cunningham's etc. Weight Acetal: 8g