Inventories

The following table summarizes the components of inventory:



	December 31,
	2018		2017
Raw materials and supplies	$	97.7	$	72.1
Work in process	53.0		37.1
Finished goods	82.4		64.5
Total inventories, net	$	233.1	$	173.7

Our inventories, net, balance was $233.1 at December 31, 2018 compared to $173.7 at December 31, 2017, representing an increase of $59.4. The VRV acquisition added $49.0 to our inventories, net balance at December 31, 2018. The VRV acquisition is further described in Note 12, “Business Combinations,” to our consolidated financial statements included elsewhere in this report.

The allowance for excess and obsolete inventory balance at December 31, 2018 and 2017 was $9.0 and $7.1, respectively.