Cap fits my carpet cleaner perfectly! I didn't have a lid, that was the only reason I couldn't use the machine. I got 2 capsules for about $7 and fast! Just screwed in and washed carpets again! I was sooo glad I didn't have to wreck the whole car just because of the missing cover. It's very tight so I'm having a hard time unrolling it. Overall I would recommend it and I would buy it again.