Measurement Relevance Price: Low - High Price: High - Low Alphabetically: A - Z Alphabetically: Z - A Irwin Powermeter Twin £194.25 Irwin Digital Balance 1000g/0.01g £168.00 Charles Law SmartCase Pack £167.95 Irwin Powermeter AC £141.75 Irwin Powermeter DC £131.25 Boyles Law £120.00 Loudspeaker Unit £41.95 110 Volt Test Lead £38.95 Digital Infa red thermometer £32.50 Charles Law Apparatus £18.85 School Stop Clock £14.50