Sailboat Hardware 100 mm 4 Inch Aluminum Single Swivel Block Max 4000kg 2810 Features: Aluminum material with high strength,delicacy appearance, longer block life. Preservative treatment Torlon roller bearings Stainless steel accessories. Use for: Mainsheet fine-tune Main/jib sheets Control lines Vangs Outhauls Specification: Brand : Blue Shark Part Number : 2810 Single swivel block Head can be fixed at 0 or 90,or left free to swivel 360 Sheave: 3 inch, 75mm Weight: 32oz, 900g Max Line: 5/8 inch, 16mm Shackle: 1/2 inch,12mm Maximum Working Load: 8818lb,4000kg Breaking Load: 16535lb,7500kg Destination custom duty is not included in the listing price; it is the customer's responsibility to pay for custom duty if any. Shipping by China Post Registered Air Mail with shipping tracking number provided. It will take about 2-3 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.