We are making all kinds of outdoor and indoor fireplace, the attachment is one type of our models, if there is anything I could help with you, it is my pleasure. We have experience on this field, we have dealt in OEM & ODM for worldwide customers for 30 years. Most of our products are with CSA certificate, CE standard will be applied for and have the approval recently. We have formulated inspection list for our products. The inspection control plan could be made according to our customers request. So you could find out that we have complete production capability to produce gas valve, fireplace system, and multifunctional controls for gas burning appliances for residential and commercial field. We have the confidence to provide you with product in good quality. If you have other questions, please feel free to contact with me. We look forward to hearing your positive feedback.Thank you very much for your patience to read the description. Please give you and us a chance to create our future.