This excerpt taken from the SMP 10-Q filed May 8, 2009.
Seasonality. Historically, our operating results have fluctuated by quarter, with the greatest sales occurring in the second and third quarters of the year and revenues generally being recognized at the time of shipment. It is in these quarters that demand for our products is typically the highest, specifically in the Temperature Control Segment of our business. In addition to this seasonality, the demand for our Temperature Control products during the second and third quarters of the year may vary significantly with the summer weather and customer inventories. For example, a cool summer may lessen the demand for our Temperature Control products, while a hot summer may increase such demand. As a result of this seasonality and variability in demand of our Temperature Control products, our working capital requirements typically peak near the end of the second quarter, as the inventory build-up of air conditioning products is converted to sales and payments on the receivables associated with such sales have yet to be received. During this period, our working capital requirements are typically funded by borrowing from our revolving credit facility.