Ohto Ceramic Rollerball Refill - 0.5mm

I have a heavy metal twist pen that was a gift from a kickstarter project, and was advised to get OHTO rollerball refills for it. I love this refill, it is smooth and the color is intense. I use them with any pen that they fit. Yoseka consistently has them available and at a good price. Highly recommend this refill!