Continental 3-inch Black Decorative Trim Kit for Traditional Fireplace TK353 inch Black Decorative Continental Trim Kit TK35 Product Details TK35 Decorative 3" Trim Kit. Fireplace unit installation is just the first step; the addition of accessories, surrounds, and final touches like this two inch trim kit is essential for a complete picture. There is a minimum of cutting and adjustment required to use this trim kit. This kit fits frames with an opening of 37. 5 by 34. 5 inches. The entire kit weighs five pounds. Features: