Significant Customers No customer accounted for more than 3% of our consolidated revenues in 2017, and we do not believe we would suffer a material adverse effect to our consolidated financial statements if we were to lose any single customer. Any such provision is recognized using the Company's best estimate of the amount of loss incurred, or at the lower end of an estimated range, when a single best estimate is not determinable Any such provision is recognized using the Company's best estimate of the amount of loss incurred, or at the lower end of an estimated range, when a single best estimate is not determinable.

Significant Customers No customer accounted for more than 1% of our consolidated revenues in 2016, and we do not believe we would suffer a material adverse effect to our consolidated financial statements if we were to lose any single customer. Any such provision is recognized using the Company's best estimate of the amount of loss incurred, or at the lower end of an estimated range, when a single best estimate is not determinable. Any such provision is recognized using the Company's best estimate of the amount of loss incurred, or at the lower end of an estimated range, when a single best estimate is not determinable.

GEON EXP DB 15020601301 NATURAL S210AR192 DO NOT USE PER DB EXP DB 15020606755 WHT 1034

EXP DB 15020607424 WHITE EXP DB 15020612503 WHITE EXP DB 15020612504 WHITE

Unless Seller and Buyer have expressly agreed to a firm delivery date term in a single writing signed by both parties, delay in delivery of any Products shall not relieve Buyer of its obligation to accept delivery thereof.

Open Annular Gate VALVE GATE Single-acting gates open with injection pressure and close under spring/ air cylinder action.

Unless Seller and Buyer have expressly agreed to a firm delivery date term in a single writing signed by both parties, delay in delivery of any Products shall not relieve Buyer of its obligation to accept delivery thereof.

Unless Seller and Buyer have expressly agreed to a firm delivery date term in a single writing signed by both parties, delay in delivery of any Products shall not relieve Buyer of its obligation to accept delivery thereof.

GEON EXP DB 15020600104 WHITE GEON EXP DB 15020600107 WHITE STAN-TONE DB-15597 HI LITE BLUE

STAN-TONE DB-29358 CRYSTAL SILVER STAN-TONE DB-29359 WHITE PEARL STAN-TONE DB-29361 FLASH RED