Reservoir Breathers, Sight Glasses and Gauges │Donaldson Hydraulics
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 Glass Level Monitors - Filter Products Company
Amazon.com: P562441 Sight Level and Temperature Gauge : Automotive