Ordering & Payment


We accept most major credit cards including Visa, Mastercard and American Express. We also accept payment via paypal and Amazon Pay during checkout online. Please refer to our Privacy Policy for more information regarding our online payment gateway.

Amazon Pay makes shopping easier by allowing you to use your existing Amazon account information to pay for and have our items delivered to you. Amazon Pay is another way we can help you to safely and securely shop online.

Order Modifications

If you need to make a modification to your order, or wish to cancel your order please contact us right away. Once your order is processed and begins the fulfilment process we are unable to make changes to your order.

Coupon Codes

Promotional offers and Discounts are given at the discretion of STM and can expire at any time. If you have a coupon code, it must be entered in the field labeled COUPON CODE in the cart prior to checkout. We are unable to add or make changes to your coupon code after you have placed your order.

Proof of Purchase

For online orders you will receive an order confirmation email, which will be used as your proof purchase.

Order Cancellation

If you wish to cancel an order you placed online, please call us right away at 858-391-0061. We are able to cancel orders if they have not been processed through our system. Once an order has been processed we are unable to cancel the order. If you are unable to cancel your order, please refer to our returns page.