Reservoir Breathers, Sight Glasses and Gauges │Donaldson Hydraulics
P562433 by DONALDSON - Hydraulic Sight Glass - 1/2-13 UN thread size
Amazon.com: Sight glass 1 1/4" BSP : Automotive
Donaldson 1C073136-63 PG-EG 0025 Superplus 1 in. Tri-Clamp 316L SS Sanitary Liquid Filter Housing, 3-A SYMBOL AUTHORIZED - 10/3 Element Size - John M. Ellsworth Co. Inc.
Des-Case Oil Sight Glasses - Filter Products Company
Cipriani Harrison Valves Corp. 95 Series 304L SS Pyrex Sight Glass - John M. Ellsworth Co. Inc.