'70 EPDM 331 'O' rings'. Black coloured, injection moulded EPDM 'O' rings. Shore hardness 70. Tested in-radius size between 0.42mm & 1.77mm. For use with water up to 85°C. When processing an application for WRAS Product Approval, the in-radius tolerance size cannot be applied. Only sizes between 0.42mm & 1.77mm are covered by the approval.
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