3/16"- 5/32" (4.7-5mm) Silicone Vacuum Caps - Blanking Caps - Masking Caps - Tubing Caps - High Temp Black Silicone Our vacuum caps feature a high resistance to ozone, water, weather, and extreme temperature. Vacuum line Caps allow you to properly seal off any unused vacuum port. High temperature silicone/rubber masks for powder-coating, e-coating and anodizing processes. This material is very durable for repeat high temp paint curing applications. Inner Diameter: 3/16" (4.7mm) Outer Diameter: 1/4" Length of Barrel: 1" Wall Thickness: (.050) 3/64" Caps are rated for temperature resistance from -40 to 260C Application: BOV pipes Intake Pipes Oil Breather tank / Oil Catch can plug Radiator reservoir tank plug Radiator blanking plug Intercooler Pipes Boost controller plug Powder Coating Anodizing E-Coating Other Industrial applications Welcome to Magic Hub store. Your satisfaction is our priority. If there are any questions before and after purchase, please welcome to contact us, we will try my best to solve all for you.