YUNZORI | Direct factory price | OEM & ODM supported | ISO 9001:2015, FDA 21 CFR 177.2600, LFGB, RoHS, REACH Product Overview Custom Silicone Snap Hole Sealing Plugs for Sheet Metal Processing are engineered and moulded in-house by Dongguan Yunze Silicone Products Co., Ltd. Manufactured from 100% platinum-cured silicone rubber with 50°A Shore A hardness and temperature range of -40°C to +250°C (-40°F to +482°F), these custom silicone plugs are designed for demanding