Tungsten-copper protective tube is a composite material tube, made from a blend of 93% tungsten and 7% copper. 

In the first half of April 2024, the long-term contract prices (including 13% value-added tax) of main China tungsten companies for wolframite concentrate (WO3≥55%) were 126,500 yuan per standard ton, an increase of 2,000 yuan per standard ton compared to the second half of March 2024. For scheelite concentrate (WO3≥55%), the prices were 125,500 yuan per standard ton, an increase of 2,000 yuan per standard ton compared to the second half of March 2024. And for ammonium paratungstate (APT) (national standard grade), the price was 188,500 yuan per ton, an increase of 3,500 yuan per ton compared to the second half of March 2024.

In the first half of April 2024, the prices of high-grade wolframite concentrate from main China tungsten companies were 128,500 yuan per standard ton, an increase of 2,500 yuan per standard ton compared to the second half of March 2024.

In the first half of April 2024, the long-term purchase price of ammonium paratungstate (APT) of main China tungsten company was 187,500 yuan/ton, an increase of 2500 yuan/ton from the second half of March 2024.