Name: Silicone Rubber Plug (Hollow silicone plug) Material: Silicone (Characteristics: High temperature resistance/Acid and alkali resistance/Aging resistance/) Size: 6.8mm 7.3mm 7.8mm 8.3mm 9mm 10mm 11mm 12mm 13mm 14mm 15mm 15.5mm 16mm 17mm 18mm 19mm 20mm 21mm 22mm 23mm 24mm 25mm 26mm 27mm 28mm 29mm 30mm 30.3mm 31.3mm 32mm 33.3mm 34.8mm 36.3mm 37.6mm 39.3mm 41.3mm 43.5mm 46.3mm 48.5mm 49.8mm 51.3mm 52.5mm 53.6mm 58.6mm 61.6mm 63.6mm 66.3mm 68.6mm 71.3mm 73.6mm 76.3mm 81.3mm 86.3mm 91.3mm 101.5mm 106.5mm 111.5mm 121.5mm 146.5mm 161.5mm Quantity: 1/2/3/5/10/20/30pcs Standard: GB Surface: White/Black (This product is available in two different colors, white and black. Please buy with caution.) E: Inner orifice Attention: 1.Due to guide measurement, please enable for minor errors. 2.Due to variations between various monitors, photographs might not replicate the particular coloration of the project. 3.If you've any questions about this product, please be happy to touch us at any time. We will respond to you as soon as possible. 4.Thank you a great deal on your support. Enjoy shopping ❤❤❤