Light Topaz 32 x 4mm Tubing - Chinese Glass Manufacturers
solid glass tube Strong and Reliable - Alibaba.com
Amazon.com: PQAPGT Blue 4 Inch Long 10 Pieces Glass Borosilicate Blowing Tubes 12 mm OD 2mm Thick Wall Tubing for Various Applications : Everything Else
Milky Purple 9 x 2mm Tubing - Chinese Glass Manufacturers
solid glass tube Strong and Reliable - Alibaba.com