70 Shore A Silicone O-Ring for Pump and Valve Sealing High Temperature Heat Resistant YUNZORI | Direct factory price | OEM & ODM supported | ISO 9001:2015, FDA 21 CFR 177.2600, LFGB, RoHS, REACH Product Overview 70 Shore A Silicone O-Ring for Pump and Valve Sealing is engineered and moulded in-house by Dongguan Yunze Silicone Products Co., Ltd. in Dongguan, China. Manufactured from 100% platinum-cured silicone rubber (70°A Shore A, -40°C to +250°C / -40°F to +482°F), this