Multitrade Malta - Tellure Rota Wheels and Castors - TR738203

"SIGMA ELASTIC" RUBBER WHEELS, SWIVEL BRACKET WITH BOLT HOLE TYPE NL, WITH FRONT LOCK

Castors which have a bolt hole could be mounted on to a trolley either by means of a bolt, or an expansion fitting. While the hole has a 12 mm  diameter, it could also take an adapter which reduces it to 8 or 10mm, according to requirements.