If you require the 6 inch mold, a rental is available. The fee is an additional $30.00 per month. To include the mold with your kit, you must call us at 810.280.6987 to give us your credit card information as we do not get that information from the website order. You have the rental for 33 days, which allows for the shipping time. If the mold is not returned in the first 33 days you will be charged for an addition month rental of $30.00. If the mold is not returned to us in the 63 days you will be charged in additional $60.00 for the total cost of the mold.