Brewzilla (Robobrew) Replacement Lid Knobs (Set of 2)
Brewzilla

Brewzilla (Robobrew) Replacement Lid Knobs (Set of 2)

$9.99

Replacement Plastic Knobs for Robobrew 35L Lid (Pair)

This is sold as a pair of 2 knobs.  They fit the glass lid that comes with the Robobrew 35L.

These replacement knobs include the phillips head screws too.