ALUMINIUM CORE - VULCANIZED BLACK ELASTIC RUBBER.
Black elastic rubber coating, hardness 73±5 Shore A.
Core in die-cast aluminium alloy.
Excellent smooth and silent running; high abrasion resistance.
Temperature range: -20°C / +70°C (-4°F / +158°F).
Hub with: shielded precision ball bearings; standard roller bearing.
MEDIUM DUTY SPRING CASTORS.
Finish: electro-painted, black.
Steel-sheet top plate with bearing seat.
Oblique bearing with double row of balls.
Swivel fork in steel-sheet.
Polyurethane buffer spring.
Equaliser swinging on bronze bushes