Item I​D 1​8​0​9​9​

easy installation and removal

UPC Product: 00633955547223

Confined Space Centrifugal Blower

They are also used for limiting the depth of cut (same principal as router bits with guide bearings)

Graco 123159 FITTING, FLARED, 1/4 PIPE, 90 ELBOW Riding Item I​D 1​8​0​9​9​Specifications UPC Product: 00633955329256 Family Code: FAMTHP Country of Origin: US Unit of Measure: EA Height: . 75 IN 1. 905 CM Length: . 85 IN 2. 159 CM Width: 1. 4 IN 3. 556 CM Volume: . 001 FT3 0. 000 M3 Shipping Weight: . 1 LBS 0. 045 KG Technical Specifications Angle () 90 For Use With Pipe Size A (in) 1 4 Size A (mm) 6. 35 System of Measurement Imperial Type Elbow Style Flared