Johnson 3748 I-Beam Level, 48 in L, 3-Vial, 2-Hang Hole, Non-Magnetic, Aluminum, Black paint--07-13-26 For sealing heating and cooling

For sealing heating and cooling air ducts

Exclusive Shock Reduction Grip® is molded on and offers the utmost in both comfort and durability

Conforms to government specifications GGG-S-1408

The soft comfortable foam expands quickly in your ear for a secure seal to protect against hazardous noise

Removable and replaceable brush (Forney 70501) for cleaning

Johnson 3748 I-Beam Level, 48 in L, 3-Vial, 2-Hang Hole, Non-Magnetic, Aluminum, Black paint--07-13-26 For sealing heating and coolingJohnson's 3700 I beam level was designed to be durable and easy to use so much so that it has been the standard in the industry for over 30 years. Its heavy duty aluminum frame ensures accuracy and is durable enough to withstand even the roughest jobsite abuse and that frame is protected by shock absorbing end caps if the level is accidentally dropped. The level also comes equipped with replaceable, durable acrylic vials that are impact resistant