{"product_id":"allen-20mm-dynamic-block-back-to-back","title":"Allen 20mm Dynamic Block Back To Back","description":"\u003cp\u003eThe Allen 20mm Dynamic Block Back To Back is designed with opposing sheaves to efficiently manage two control lines at a 180 degree angle. It features a sturdy stainless steel side strap and nylon mouldings that ensure the block stays intact under high opposing loads. Its strength allows for a slight V shape, making it useful in applications like triangle backstay systems found on sports boats. One popular use is in a dual pole and spinnaker launcher system, as seen on a 49er. The block's patented bearing system, utilizing twin rows of stainless steel ball bearings on a stainless steel rail, provides unmatched load-carrying ability and durability compared to plastic rail bearing systems. Its becket design, with a large central rivet, reduces weight and provides a rope-friendly attachment point for cascading systems.\u003c\/p\u003e","brand":"Allen Brothers","offers":[{"title":"Default Title","offer_id":50447363866933,"sku":"ALL-A2028","price":34.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/0392\/1461\/files\/ALL-A2028_200x200_8bc8f979-cae4-42ff-8de2-c337e47477f4.jpg?v=1753054890","url":"https:\/\/senditsailing.com\/products\/allen-20mm-dynamic-block-back-to-back","provider":"SendIt Sailing","version":"1.0","type":"link"}