Compatible Knitting Machine---Suitable for KH821, KH831, KH851, KH868, KH860, KH871, KH881, KH891, KH892, KH893, KH894, KH930, KH940, KH970, CK35, KH260, KH230 Knitting Machine. How to Replace the Sponge Bar---With a flat with a screwdriver to open two layers of blank arrow head, remove white plastic head, take out the original sponge and clean it, with glue, put the new sponge bar, and restore the plastic head white back to original position and white lever pressure holder. ​ High-Quality---Made of high quality and medium density foam materials, Light weight, useful replacement accessories for your knitting machine. A Necessary Tool For Knitting Machine cloth on the top, ready to use. Easy installation, easy to replace with stable characteristics and high reliability. Quality Guarantee---We supply 1 year warranty, 30 days money back, 7x24 hours email support. If you have any problem, please don't hesitate to contact us, we will try our best to solve it for you.