I have a glass holes.com complete 1500gph over flow kit up for sale. It has never been used and I got it a few weeks ago. The kit comes with everything need to install it on your monster. Overflow box, diamond coated drill bit for glass, 2-1.5'' 90 degree bulk heads with vent tube for drains, template for drilling, directions for install, all gaskets for bulk heads, *** also a return 1.5'' bulk head in black that usually does not come with there kit and was purchased extra,. This cost me 112.00 bucks shipped and it is for sale for 85.00 plus shipping. Shipping to the US will be in a flat rate box for 5.oo. And anybody out side of the US pm me your address and i will get you a shipping quote. Here is the install video from there site. The video is of them installing there smaller 700gph unit. http://reefercentral.com/install.html