With good toughness, high strength and wear resistance, the oil sights glass are durable and have a long service life. It has the advantages of simple installation, strong sealing and convenient use. Featuring a transparent window, this product makes it easy for you to observe the level in the container and clearly see the color and clarity of the oil and the accumulation of water or other contaminants. It is constructed of aluminum material. There are 13 styles for your reference. It is suitable for workshops, projects, factories, machinery and so on. Item Name: Oil Sights Glass Material: Aluminum Features: Heavy Duty, Wear-Resistant, Good Toughness Size Details: Diagonal Edge Size: Style A: 2.12cm/0.83" (Approx.) Style B: 2.1cm/0.83" (Approx.) Style C: 2.377cm/0.94" (Approx.) Style D: 2.621cm/1.03" (Approx.) Style E: 2.846cm/1.12" (Approx.) Style F: 3.17cm/1.25" (Approx.) Style G: 3.19cm/1.26" (Approx.) Style H: 3.6cm/1.42" (Approx.) Style I: 2.116cm/0.83" (Approx.) Style J: 2.628cm/1.03" (Approx.) Style K: 3.18cm/1.25" (Approx.) Style L: 4cm/1.57" (Approx.) Style M: 4.78cm/1.88" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Oil Sights Glass