Product Name : Mechanical Seal;Model No. : 301-12Internal Diameter : 12mm / 0.47inch; Overall Size : 26 x 12mm /1.02 x 0.47inch(H*Max.D)Material : Rubber, Metal, Ceramic;Color : Black, White, Silver ToneNet Weight : 13gFeatures single coil spring, rubber bellows structure, durability and stability.Widely used in the food and beverage processing industries, etc.Package Content : 1 x Mechanical SealOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.