Inventories

6 Months Ended

Jun. 30, 2019

Inventories consisted of the following:



(In thousands)	June 30, 2019		December 31, 2018
Raw materials:
Fluids systems	$	144,699	$	148,737
Mats and integrated services	6,380		1,485
Total raw materials	151,079		150,222
Blended fluids systems components	34,515		38,088
Finished goods - mats	7,870		8,586
Total inventories	$	193,464	$	196,896

Raw materials for the Fluids Systems segment consists primarily of barite, chemicals, and other additives that are consumed in the production of our fluids systems. Raw materials for the Mats and Integrated Services segment consists primarily of resins, chemicals, and other materials used to manufacture composite mats, as well as materials that are consumed in providing spill containment and other services to our customers. Our blended fluids systems components consist of base fluid systems that have been either mixed internally at our blending facilities or purchased from third-party vendors. These base fluid systems require raw materials to be added, as needed to meet specified customer requirements.