Fits all machines using E61 group head.
Add this simple device to your E61 group to add pressure / flow control.
Simple instructions included.
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Reviews
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control your best shot ever
Perfect fot my Rocket R58 v3 (cinquantotto) with simple instructions to install all the absolute freedom to control every dose while reaching the best stage for each roasting Whoever hasn't bought flow control has missed it a lot. I'm very recommend don't miss it