Hello, the window hanging pulley 060075, the small window pulley 060075 belongs to the sixth category 0608 similar group, the pulley (not for machine use) 060207 belongs to the sixth category 06 12 similar group, the machine parts pulley *070099 belongs to the seventh category 0750 similar group, and the plastic curtain pulley 200262 belongs to the twentieth category 20652.