Ytd, I replace my Kyosho ZX-5 4wd buggy's slipper pad. when I took the slipper apart, all the sudden, the little alum slipper ring pop up on my eyes....Ha, that's exactly the part I need for my 4x4 Slash's slipper melted plastic ring. I mean, EXACTLY!. same style, same size that fit the stock 10x15x4 bearing. it made out of blue alum from Kyosho part #LA203. that little ring call blue slipper retaining unit. you can get the whole kit from A Main for $7.69. http://monster.traxxas.com/showthread.php?t=523946