Pulley double with rod, SE (spare)

For experiments with compound or double pulley blocks, for the ‘simple machine’ sector;
Two pulleys with deep cord groove (which ensures a good hold of the cord), each with central hole with brass sleeve for low-friction, rotatable bearing on bearing bolts, mounted in parallel on holding bracket made of robust steel
Material of the reels: ABS plastic, red and blue
Bracket material: nickel-plated steel
Diameter of castors: 52 mm
Diameter of the bracket: 3 mm
Dimensions: 80 x 52 x 20 mm
Mass: approx. 14 g