Grade 304 Pressed stainless steel fixed castor with a flate plate fitted with a grey electrically conductive rubber tyre on polypropylene centred wheel with ball bearing. Wheel diameter 75mm, tread width 24mm, overall height 101mm. plate size 60mm x 60mm, hole centres 49.5mm x 49.5mm or 42.5m,m x 42.5mm Load capacity 60kg.Conductive offers a resistance R<10__