material Light weight and durability This is High quality of metal material Easy installation, Excellent fitment and Superior Material Type:Piston Kit Condition: Fitment Type:Direct Replacement Part Number:3C8-00001 3C8-00001-3 Fitment: Piston Kit STD (68mm) for M40D2-M50D2 2 Stroke (Fits only 3Cylinder Engines) For MERCURY MARINER 40HP (Serial No: 0N000001& Later) 50HP (Serial No: 0N051023 & Later) 3Cylinder (International) (Part Number 779-9615 2) (for reference only) Color:As Shown Material:Metal Package Contents: 1set x Piston Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.