The SIG SAUER Romeo 9T 1x38mm Prismatic Red Dot Sight, Black, SOR91001 Color: Black, Magnification: 1 x, Objective Lens Diameter: 38 mm, Reticle: Dual Color Reticle, Illumination Color: Green, Red, Adjustment Click Value: 0. http://thankyou.eoapps.co.kr/bbs/board.php?bo_table=free&wr_id=823177