The 30 degree angle eliminates the cost and labor required to attach an additional 30 degree elbow fitting

Phoenix 4022636 Process Air Filter 850 desiccant 20inch X 20inch X 2inch Merv 8

and more efficient

This special blend of soil-blasting

Tuway Thin One Bonnet 12 inch each Dri-eaz The 30 degree angle eliminatesThe Tuway Thin One Bonnet is a favourite bonnet for OP "oscillating pad" machines because they are so durable. The Thin One bonnets are the most durable bonnet pad on the market. They are not as absorbent as a cotton pad, however, if you're cleaning with an Encapsulation Detergent, these bonnets work very well. This process is often referred to as "PadCapping". You will be performing the cleaning with two modes of cleaning 1 absorption via the bonnet,