The Quake Bushwacker 270 See-Thru Riflescope Optic Cover comes in five different sizes, from 3 to 7, and is available with either an amber or a black finish. These optic covers fit a majority of riflescopes, both the ocular and objective lenses, ranging from 1.20 inches/30.4mm to 2.20 inches/62.2mm. These optic covers feature a snap-lock lid that prevents dust and debris from building up on your lens