[Michael C Henry]

That looks as though they work. The foam that is in my trimmed down S&H air cleaners I've got are a fine green foam that started as flat foam material and was cut into a long strip and butt glued to form a circle, and I'm sure filtering out everything including a lot of the air I want to, get through. Your tops are a great touch. So I see an inner and outer rings forming the sides and probably two circles with foam in-between. Where did you source the outer top rings from? The foam material you used is like the green foam that my car came with , but was replaced . I haven't bought from McMaster Carr before . How much stuff did you need to purchase?