Features:
1) Made of soda lime glass
2) Size: 1. 8 - 40mm (OD +/- 0. 25mm)
3) Wall thickness: 0. 65 - 2. 80mm (+/-0. 05mm)
4) Lighting tubes: energy saving lamp, vent pipe, headlight lamp
5) We can also customize these products according to buyers' requests

Specifications:
1) Expansion: 90 + 2. 0 x 10 - 7/oC
2) Waterproof stability: grade 4
3) Annealing point: 510 - 380oC
4) Volume resistively TK-100: 230oC
5) Temperature of softening point: 560oC
6) Heat resistant emergency performance (ΔT): 110oC

packing:
First paper wrapped, and then two ends wrapped with carton paper