Size: 4.5*3.5*8.8cm/1.8*1.4*3.5in The Model Shows Four Stages Of Arteriosclerosis Stage 1 - Normal Blood Vessels, Stage 2 - Fat Streaks (fat Deposits In The Intima), Stage 3 - Arteriosclerosis (atheroma), Stage 4 - Fibrous Plaque And Obstruction. Arteriosclerosis Is A Non-inflammatory Disease Of The Arteries That Thickens, Hardens, Loses Elasticity, And Narrows The Lumen Of The Arterial Wall. Made Of Environmentally Friendly PVC, Artificially Written And Well-made.