Cost-effective Plastic 4×20 Non-Illuminated Scope.  This lightweight 4x fixed power scope adopts full plastic one-piece tube construction, weighing only 96g with a total length of 267mm. It comes with a 20mm blue coated objective lens for basic clear sight pictures, and supports diopter adjustment to sharpen the reticle for different eyesight. 49–65mm eye relief offers comfortable aiming experience.