Review on Enhance Drawer Functionality with 6 Pairs of 17mm Grooved Plastic Rail Drawer Runners, 300mm Length Slides by Dewitt Graham

I had a pine Ikea dresser that had a couple of broken plastic drawer slides. Numbers (320x?x?) were printed on the slides, an exact replacement could not be found. They looked the same so I took a chance and bought them. They were EXACTLY the same length even though they were marked 300mm so I have no idea what the difference is, but they were wider than the originals (side to side, not "height" which is slot width, through which they glide). on the). If I used 2 I wouldn't fit in the drawer: they were too wide as a pair. I was only able to get them to work by moving the remaining sliders on the dresser so I could use an old and a new one in each drawer. Conclusion: try to measure all three dimensions of the elements to be replaced!