Silicone Vented Masking Plugs with Center Hole High Temperature Heat Resistant YUNZORI | Direct Factory Price | OEM & ODM Supported Certified to ISO 9001:2015, FDA 21 CFR 177.2600, LFGB, RoHS, REACH standards Product Overview Engineered and moulded in-house by Dongguan Yunze Silicone Products Co., Ltd., these silicone vented masking plugs are manufactured from 100% platinum-cured silicone rubber (55°A Shore A, -40°C to +250°C / -40°F to +482°F). Designed for demanding