Quoted from Monster_Bash:Part number for reference so Steve doesn't tear you a new one when you call
30559 3/8 cog coupler at $4.10 each.
30560 1/4 cog coupler at $4.10 each
30558 cog sleeve at $3.06
ROFL! This post is 5 years old, but I got mine “torn” last week! Did not know about the part numbers fetish. Lesson learned.