The Worcester Bosch screw is for the gas assembly of Bosch, CDi Series, Danesmoor, Greenstar, Greenstar 8000 Life, Greenstar 8000 Style, Greenstar ErP, Greenstar Oil, Heatslave, Highflow, Si/C1 Series, CBi Series, i Series, CDiXtra Series, 230, Compact, 240 and RD Series boilers.
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