Sailboat Hardware 50mm 2" Single Swivel Shackle Becket Fairlead Cleat Plain Bearing Block Master BP-0511F 50 mm Plain Bearing blocks are typically used for high loads for Halyard tuning, Mainsheet systems, Mast foot blocks, Mast head blocks and boom vangs. An exclusive Face to Face locker system can be easily engaged to position shacke in either of two directions or just free to swivel. A locker system also can take more loads then traditional ways without damaging the block and hassle. Patent pending in Australia, US, UK, France, Netherlands, China, Germany, and Taiwan. •Do not use Master products to human suspension! Specification:Brand: MasterPart Number: BP-0511FSheave Ø (mm) 50 mmSheave Ø (in)2 inLength (mm)120 mmLength (in)4-5/7 inWeight (g)184 gWeight (oz)6.49 ozMaximum line Ø (mm)10 mmMaximum line Ø (in)3/8 inMaximum working load (kg)100 kgMaximum working load (lb)220 lbBreaking load (kg)200 kgBreaking load (lb)440 lbDestination custom duty/tax are not included in the listing price; it is the customer's responsibility to pay for custom duty if any. Shipping by China Post ePacket/Registered Air Mail with shipping tracking number provided. It will take about 3-4 weeks’ time to deliver to you after shipping out, some countries may take longer time to deliver. If you want faster delivery, please contact me for shipping upgrade.