plastic double wheel furniture caster with heavy duty socket

1) Item no. FC51-0904 . Plastic material,black color

2) Dia is 40mm 

3) Heavy duty socket 

Drawing of this caster

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Information of other furniture casters

FC51-0101 ,

Dia can be 30mm,40mm and 50mm

Type,with or without brake

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FC51-0105 ,

Dia can be 30mm,40mm and 50mm

Type,with or without brake

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FC51-0702

Dia can be 40mm and 50mm

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FC51-0202 ,

Dia can be 30mm,40mm and 50mm

Type,with or without brake

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FC51-0602 ,

Dia can be 30mm,40mm and 50mm

Type,with or without brake