Plastic Tube Bases from Skylighter.com http://www.skylighter.com/ Pyrotechnic supplies shipped everywhere in the US including plastic containers for chemical storage and mortar tube plastic bases. Plastic Base for One #0 Mortar http://www.skylighter.com/mall/product-details.asp?id=90 Plastic Base for One #2 Mortar http://www.skylighter.com/mall/product-details.asp?id=984 Plastic Base for One #5 Class C Mortar http://www.skylighter.com/mall/product-details.asp?id=93 Plastic Base for One #100 Mortar http://www.skylighter.com/mall/product-details.asp?id=669 Plastic base for, 2-1/2-Inch, #100 mortar tubes.