Ray-Ban - 54 mm 0RB4378. Color Black/Grey Gradient. Low Stock. On sale for $132.80. MSRP $158.00.. 3.0 out of 5 stars2 left in stock+2Brand NameRay-BanProduct Name54 mm 0RB4378ColorBlack/Grey GradientPrice$132.80MSRP: $158.00Rating3Rated 3 stars out of 5(1)