Petra is a wholly-owned subsidiary of WMF - one of the pre-emminent manufacturers of coffee machines and is based in Germany.
The Petra KM 45 is a small use automatic espresso/cappuccino machine which utilises coffee pads which hold 7 grams of pre-ground coffee (the insert also has space to increase this to two coffee pads for 2 cup drinks) in order to make fantastic tasting coffee beverages including espresso, black coffee, cappuccino, caffe latte, red espresso and even instant based coffee beverages.
Petra machines are perfect for all small use applications such as small offices, meeting rooms, guest houses, hotel rooms, client areas, etc where the cost of a machine which fresh grinds coffee beans is too prohibitive.
The coffee pads are supplied in foil sealed pouches and are also considerably more cost effective than pod or capsule based coffee products.

The Petra KM 45 has the following features and specifications:
- Suitable for all commercially available pad brands in the market.
- Real beverage choices by just pushing a button:
- Cappuccino, latte macchiato or café au lait, coffee and instant beverages.
- Patented Perfect crema system for an outstanding coffee crema quality.
- Professional milk foaming quality directly into the cup.
- Automatic pre-brew function: optimally enhancing the coffee aroma.
- Variable setting of cup volume from 50 ml to 300 ml, ideal for every cup size.
- Premium quality components: Hot Water Boiler made of durable stainless steel.
- Safety in use: Off, and more.
- Energy saving features:
- Energy saving mode (automatic shut-off after the last cup)
- Sleep mode after 5 minutes without use
- Automatic power switch-off after 30 minutes