As an Amazon Associate, we earn from qualifying purchases. Home » La Marzocco » MZ_B100102K La Marzocco GB5/FB80 Steam Valve Knob/stem Retro-fit Kit - B.1.001.02.K La Marzocco . MZ_B100102K Gallery Attributes Brand name, Manufacturer name, ManufacturerLa Marzocco Extra Product NameLa Marzocco GB5/FB80 Steam Valve Knob/stem Retro-fit Kit - B.1.001.02.K moq, multiple, tierMinQty11 MPN, SKUMZ_B100102K qtyInStock0 tierPrice191.14 Distributor offers SellerSKUMOQIn stockMultiplePrices espressoparts.comMZ_B100102K111 @ $91.14