CONCENTRATION OF CREDIT RISK

12 Months Ended

Dec. 31, 2015

Notes to Financial Statements

NOTE 9 - CONCENTRATION OF CREDIT RISK

Financial instruments that potentially subject EnerTeck to concentration of credit risk are accounts receivable. Currently all Accounts Receivable are considered collectible. EnerTeck performs ongoing credit evaluations as to the financial condition of its customers. Generally, no collateral is required.

EnerTeck at times has cash in bank in excess of Federal Deposit Insurance Corporation ("FDIC") insurance limits.

For the year ended December 31, 2015, sales to each of two customers exceeded 10% of total sales, and aggregated to approximately 48% of total sales. Those two customers represented approximately 34% of total accounts receivable at December 31, 2015. For the year ended December 31, 2014, sales to each of three customers exceeded 10% of total sales, and aggregated to approximately 60% of total sales.