1.

Twin-Wheel Nylon Castors (with polished chrome or brass stems)
Model: STW40, 50 (6-8)B/O
1.40mm Twin-Wheel Nylon Castors (with polished chrome stems) 2.50mm Twin-Wheel Nylon Castors (with polished brass stems)

2.

Twin-Wheel Nylon Castors (brake body only)
Model: TWB40, 50 (6-8)B/O
1.40mm Twin-Wheel Nylon Castors (brake body only) 2.50mm Twin-Wheel Nylon Castors (brake body only)

3.

Unhooded Twin-Wheel Castors (nylon, body only)
Model: UTW40, 50 (6-8) B/O
1.40mm Unhooded Twin-Wheel Nylon Castors (body only) 2.50mm Unhooded Twin-Wheel Nylon Castors (body only)

4.

Cylinder Twin-Wheel Castors (nylon, 38mm x 50mm, body only)
Model: CTW3850 (6-8) B/O
50mm Cylinder Twin-Wheel Nylon Castors (body only)