I have been asked if I make these tank covers for sale...and the answer is no I just make them for friends. I will tell you guys how to make them yourselves though. You can order neoprene from many different sources, but I like to use Seattle Fabrics because they are so nice and so helpful. The lady will tell you over the phone how to access their color/pattern chart on your computer. Once you pick the color or pattern just give her the approximate dimensions of the size you need and she will sell you the correct piece.
http://www.seattlefabrics.com/ Next you need to measure the circumference of your air tank and then subtract one inch. By subtracting one inch from the circumference you will end up with a cover that fits very snugly. You will find that neoprene will stretch quite a lot. Then you measure the length you want...I like to measure from the very bottom of the tank to the "shoulder" of the tank at the top just where it begins to slope down to the valve. So then, you should have a piece of neoprene in the shape of a rectangle that is one inch less than the circumference of your tank, and the length you prefer. Make sure you order a piece big enough to make the circular bottom piece as well.
To make the seam I use the Weldwood Contact Cement...
https://www.homedepot.com/p/DAP-Weldwood-3-fl-oz-Original-Contact-Cement-00107/100195615 The secret is to apply it to both edges to be joined together and let it dry for about 10 minutes...then apply a second coat and let it dry for about 5 minutes. I apply the contact cement with a q-tip or a toothpick. Practice this on a piece of scrap a couple times to figure out how to do it, because once you press those two edges together they are going to instantly weld themselves together and you won't be able to pull them apart without ripping the neoprene.
To make the bottom piece I divide the circumference of the new neoprene cylinder by 3.14 which gives me the diameter. I divide the diameter by 2 to find the radius...I use this number to make a circle with a compass on a piece of cardboard or manila folder. I cut out the circle of cardboard with scissors and use it as a template to trace around with a Sharpie marker onto a piece of neoprene. Once you cut it out it is easy to glue it to the end of the cylinder you made. But once again, I recommend you practice this with some scrap material first to get the hang of it.
Or you can eliminate the bottom piece altogether by just making a cylindrical cover and adding a scuba tank boot to the bottom of your tank. It is hard to find scuba tank boots that will fit on a carbon fiber tank...so I bought one from Best Fittings U.K. that was about a 1/4" too small, and put it in a pot of boiling water for a few minutes afterwhich I shoved my big tank into it for a perfect fit when it cooled. Fits tighter than Dick's hatband!
Neoprene is difficult to cut...the thicker it is the harder it is to cut. I have used 5mm, 4mm, 3mm, and 2mm. The best way I have found to cut it is to use a metal straight edge clamped down on the neoprene on a glass top patio table, with a snap blade knife to cut it.
https://www.homedepot.com/p/DEWALT-18-mm-Metal-Body-Snap-Off-Knife-DWHT10038/202710464 It is best to make several passes to make your cut, instead of trying to force it. The blade will dull in one or two passes and have to be snapped off to expose a new sharp point.
Here is where to get a tank handle:
https://www.amazon.com/Innovative-Heavy-Velcro-Webbing-Carrier/dp/B003JPHKLK/ref=pd_lpo_vtph_468_bs_tr_img_1?_encoding=UTF8&refRID=K34XSDSHSCPQTMXSVBCC And here are the anti-roll feet:
https://www.ebay.com/i/371895443377?chn=ps&dispctrl=1 I drilled a hole in each of the white roll control feet so that I could use a piece of all thread rod with nuts to keep them from wanting to flip over, and I also attached a piece of neoprene to the bottom of each one to cushion it and make it non-slip. I also attached a piece of neoprene to the half moon tank cradles to cushion the tank and make it non slip also. Here are a couple pics showing the bottom piece of a tank cover, a tank boot, and the roll control feet attached together with all thread rod and 1/2' nuts.This is the best way I could think of to protect my expensive carbon fiber tanks, and it is a great way to personalize your tanks too.Have fun making your own tank covers guys!
All the best, Chuck