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Insulation for brass ball valves "Optibal" with extended plastic handle ball valves with female thread (item no. 10771/80/87/91..)

For heating systems. With stem extension also suitable for other handles.

Meet the requirements of the German Energy Saving Directive (EnEV 2009) according to appendix 5, table 1, line 5.

Building material class B2 according to DIN 4102.
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