no they are not but you have to take a closer look pay attention to the written specifications and double check with the seller and if you didn't get a clear answer for your question about the item it is probably missing something so jump to another seller. most of the time the items are exactly the same across diffrent sellers but huge difference in price even with same order quantity, in this case choose the items with average price and above, the lower prices items might not have the little details but that are significant, or lack in quality plus look for sellers with a verification badge and have previous transactions(they will write the amount of sales the have made)