Overview Reviews Product Description Rubber Universal Joint Replacement joint for rubber mast bases. 8mm female threads on both sides. Product Videos Custom Field Product Reviews Write a Review Write a Review × Chinook Rubber Universal Joint Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments * 3 Reviews Hide Reviews Show Reviews 5 New life to an old board Posted by Doug on 10th Jun 2022 I put thus universal on my Magnum 370. Hopefully I will be out on her his weekend. I think this will work like the OEM intended. 4 Item was as specified, worked well. Posted by Steve on 30th May 2020 Not the fastest delivery, they waited until the post man comes by to pick up the item. I order on Friday before the three day weekend and it did not ship until Tuesday, got the item on Friday. Just don't be in a hurry....maybe they do better on larger items... 5 Just what the doctor ordered! Posted by Unknown on 3rd Jul 2017 High quality and perfect for repairing an ancient Mistral windsurfer that I was afraid I was going to have to scrap. Also, the service was unbelievably fast.Thank you!