one of my flippy caps was leaking on my stihl ms361 , so i went to the local stihl dealership and got 2 new ones . fits nice and tight , and no more leaking at all. problem is , ive never seen any like this before , and i have searched all night online and i can't even find a picture of these anywhere. so my question is....are these a VERY new design , or did they sell me the wrong friggin ones ? cause i know these didn't come on a ms361 stock. they have 2 black lines , that when installed , line up. just odd looking , never seen any stihl products with these caps .