The Company has historically recorded the revenue and related cost of revenue for the sale of its spare parts within Products in its Statements of Operations for the Vacuum & Analysis segment. The Company has now determined that these items are better presented within revenue and related cost of revenue within Services for the Vacuum & Analysis segment in its Statements of Operations to align with the current manner in which the Company operates its services business, and has elected to reclassify these amounts in previously issued financial statements as shown below. This change in presentation has no impact on total revenue or total cost of revenue.

	Three Months Ended September 30, 2017
	As previously reported		Adjustment			As reclassified
Net revenues:
Products	$	434,710	$	(5,819	)	$	428,891
Services		51,557		5,819			57,376
Total net revenues		486,267		—			486,267
Cost of revenues:
Cost of products		225,174		1,271			226,445
Cost of services		33,098		(1,271	)		31,827
Total cost of revenues	$	258,272	$	—		$	258,272

	Nine Months Ended September 30, 2017
	As previously reported		Adjustment			As reclassified
Net revenues:
Products	$	1,259,582	$	(16,436	)	$	1,243,146
Services		144,595		16,436			161,031
Total net revenues		1,404,177		—			1,404,177
Cost of revenues:
Cost of products		659,538		3,447			662,985
Cost of services		91,514		(3,447	)		88,067
Total cost of revenues	$	751,052	$	—		$	751,052