Most hobs would be 4-burner stainless steel hobs, however some are 5 and 6-burner, and some are gas on glass type.
Before fitting larger hobs, clearances between the hob and any wall units/cupboards above on both sides need to be met and the hob must usually be a minimum of 150mm between any tall unit/ combustible material.
We install Hobs from all of the major manufacturers including Bosch, Neff, Siemens, Smeg, AEG, Belling, Stoves, Zanussi, Lamona.
Gas Hobs are usually connected with rigid copper pipe as opposed to a flexible cooker hose although some manufacturers do allow the use of these if it is stated in the manufacturers instructions for that particular appliance.