Trumark out of business due to competition
I think what happened to trumark slingshots it it's out of business
As Internet business expands, Trumark's loss of dominance in the slingshot market after 2012 is one of the most significant failures in small business history.
It is still mind-boggling how fast Trumark fell from the top rank of the dominant slingshot company to vanish in the market within 6 years.
How did this happen? The competetion just becomes much more keen than ever. Many slingshot brands from USA, China grow very fast. Trumark was Over-confidence and not reacted to the Internet market quickly.
Such as DANKUNG releases new products each month, SimpleShot postes new slingshot video frequently, while Trumark not updates its website in 20 years!
That Could be one reason leads Trumark out of business.
It took 12 days arriving here. This product is a perfect bandpass filter. That is, it lets through the 365nM UV B and blocks almost all visible light (it is a very good match for the UV LED). This is great for observing fluorescence - minerals, dyes, scorpions, glue, etc. Without a filter these diodes produce a lot of visible light that washes out too much fluorescence.
The filter makes the my flashlight(from Dankung too) UV light much more useful.