Detailed Product Description Features of No-girder and Columniation Curve Roll Forming Machine: 1 Rollers are made of good steel, coated with rigid chrome.2 The rubber feeding device of it can feed 0.5-1.5mm color steel sheets. 3 Light and convenient hoist, only 2kg (those from USA are 30kg). So quick and convenient installation is possible.4 Large span, high corrugation, high tension strength, ...