I am sure a lot of you have heard mention of the rubber sheet that comes from the Mcmaster Carr company. What you may not know is that they carry several other products that could be of interest to people who make or shoot slingshots. <br><br>Some of the products of interest I have found on the website include:<br><br>latex rubber film<br><br>steel balls<br><br>rotory cutters and cutting mats<br><br>leather strips<br><br>micarta and g10 boards (search for garolite, it's the industrial version)<br><br>I'm sure there are more that I haven't found yet. Most of them are very reasonably priced. I just ordered 100 1/2" steel balls, 250 3/8" steel balls, and 2 yards 6" wide of the .025 (equivilent to theraband gold) latex film. My total after shipping was about $30 and it shipped the same day I ordered. Unless someone knows of a source I don't, $8 per 100 pack of 1/2" steel is the best deal I have found. <br><br>As Joerg has mentioned, I don't believe they ship outside the U.S. Also the website does not calculate the shipping charge before you place your order. It is added on when they charge you, but it seems to be about actual cost.