Edd, what do you need to know. Lewmar 1x ocean 70 and 4x ocean 20. I am on the boat but can measure hatches or send you the specs for them. I have covers on the 70 and 2 20s. They are snap domed onto the aluminum frames. If you need a pic let me know and I will PM send it. It really makes a difference in the hot Ontario sun. Len
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