Optical Bench Wooden 1.5 Metre Clearance Callipers – to measure internal

Callipers – to measure internal and external dimensions of an object

12 Axle Mounts and 12 Stub Axles

Trays attach to handle for easy storage and portability

These lightweight balls appeal to children thanks to their bright colours and 'knobbly' surface – be it just to touch or for playing throw and catch

Optical Bench Wooden 1.5 Metre Clearance Callipers – to measure internalWooden baseboard 1. 6m x 140mm with a 1. 5m scale divided in mm plus 6 sliding moulded bases 100 x 50mm each with index line, brass pillar and locking screw. The following accessories are included: 1 12V, 24W S. B. C projection lamp with lead and 4mm plugs 1 white metal object screen 75mm in diameter with gauze 1 holder for lenses, 38mm diameter 1 white metal receiving screen, 100 x 75mm with a slot for squared paper screen on the reverse 1 object