This is the drip tip for the model 510 and model 901 with a large dripping hole.
You can eliminate the cartridge and drip e-liquid right through the tip and onto the atomizer without removing the tip.
It's made of delrin.
It's safe and can be easily rinsed with water.
Please rotate the drip tip when you are inserting it into the atomizer!
*Left tip in image is contoured type C
*Right tip in image is smooth tapered type D