... coating.3,One-off forming of carbon-steel bed plate,great strength ,large air-bleed hole design ... ,High load bearing of traction apparatus,the even load bearing of the entire bed is over 150kg.8 ... ,Gantry gate type traction apparatus,stainless steel tube,stable ... and wires to be purchased separately if needed.Traction weights specified for 1kg,2kg,3kg,4kg,5kg ...