If you would rather do email, on the Pro Products landing there is a column on the right called 'Main Menu'. Under that is a 'Contact' link. Fill that out to email them and include the size of your enclosure, species that will live in it, and the ambient temp range of the room your snake will be in. They'll contact you back with what sized/watt heat panel will suit your needs or ask additional questions before giving a recommendation. Then they will email instructions on how to order. The ordering part is a bit weird since you 'buy' a random product on their site like their mite spray, but put a note on that order saying what you actually want to buy.