Companies in Berkshire essentially follow the M4 corridor. In Theale are Nvidia UK (components for smartphones) and Wolseley, the builders' and plumbers' merchants who own Bathstore and Plumb Center. SPP Pumps (owned by Kirloskar Group) is at the Arlington Business Park; on the same estate PepsiCo is next to the GWML railway. Porsche Cars Great Britain is in Calcot, Tilehurst, west of Reading near Theale Interchange. Harley-Davidson UK is in Pangbourne. Vodafone, and High and Mighty are based in Newbury; Bayer UK (Aspirin, Rennie and Alka-Seltzer) is to the west; National Instruments UK is to the east off the A4 on the Newbury Business Park, and Quantel was off the A4 and is now Snell (former Snell & Wilcox, previously in Lower Earley), an important video technology company, near Aricent UK.