I prefer a glass oil burner pipe with a length of 14 to 16 cm, together with a ball. Ball diameter 45 to 55 mm. The hole in the center of the upper part of the ball is approx. 7 to 9 mm and the thickness of the glass of the pipe itself is approx. 1.5 mm and the opening of the glass tube itself is about 6 to 8 mm. Thank you in advance for your early reply as to whether it is possible to create one Glass oil burner pipes for a low price of about 0.2 USD when purchased 4 times a year (every 3 months) in the number of 50 pieces. With a low amount for shipping the shipment. Please send a maximum of 3 pieces of glass pipe as samples. Please write to me if you can make glass pipes with the parameters designed by me. Thank you again for your early reply