It's very important for us to protect and pay attention to the eyes. The Vision testing chart is made from PVC material, this eye chart is waterproof, non-reflective and without pungent smell. Suitable for reading from 3.8 meters or 5 meters. Applicable to home, school, and small hospitals. Features - Color: Mainly black and white.- Material:PVC.- Size:75.00X25.00X1.00cm/29.48X9.82X0.39in.- Note:telescopic rod is random color. -Made from PVC material with clear printing, it is a premium chart and hard to wear.- The eye chart set includes a telescopic rod and an eye occluder, very easy and convenient to use.- The eye chart assists in measuring visual acuity at a distance of 3.8-meter to 5-meter away from viewer.- The standard eye chart is suitable for home, school, or some small hospitals to use.- The C-type eye chart for pilot physical examination has an very accurate testing result. Package List1 x visual testing chart1 x eye occluder1 x telescopic rod