Item Detail Table of Content Sight Glass Diagnostic Tool Item Number: AIR90022 Supplied by AIRSEPT INC (see all) ITEM IS DISCONTINUED1-855-298-2687 Description Sight glass diagnostic tool. Features Large, clear sight glass lets you see in real time 36" hose lets you monitor the tool without crawling under the hood Use with your existing closed loop flush equipment Warranty One (1) year Product Specification Dimensions23.5" Weight0.5 lbs.