https://kingofkingscoffee.com/what-is-the-e61-grouphead/
What is the E61 Grouphead? - King Of Kings Coffee
Mar 4, 2023 - The E61 grouphead is one of the most iconic and widely used espresso machine components in the world. It was first introduced in 1961 by the Italian...
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https://bristol-twenty.co.uk/?attachment_id=5264
8_GROUPHEAD_DISPLAY_Rancilio13942_HR - Bristol Twenty Tea and Coffee Co.
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https://www.tapside.co.uk/product/puly-caff-grouphead-cleaner-370g/
Puly Caff Grouphead Cleaner 370g - Tapside Scotland, UK
Jan 6, 2026 - Puly Caff Grouphead Cleaner 900g. Prevents the build-up of tannin in coffee machine group heads. Tapside Catering Supplies.
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