<https://www.arrowheadrifles.com/product/stx/#product>
<http://schema.org/description>
"STX Module Eye Piece.\r\n\r\nPair with 65, 85, 95, of 115mm objective.   Luke runs the 115mm which provides incredible performance, but it's very bulky.   The 85mm provides a good balance of size/weight while still maintaining excellent performance."
<https://www.arrowheadrifles.com/product/stx/>