The manual trolley is made of thick steel material, fine processes, sturdy and , strong heavy duty capacity. Pre-lubricated sealed bearings for long life and reduced maintenance. Adjustable to fit standard or wide flange I-beam track. Dual wheels are designed to fit straight or tapered beam track. Features - Color: Orange. - Material: Steel. - Size: 22.00X18.00X15.80cm/8.65X7.07X6.21inch. - Welded heavy gauge steel frame and powder coat finish provide maximum durability and protection, manual trolleys are best suited for lighter cost effective jobs. - Easy to install by sliding it onto the open girder, meanwhile the load is balanced on four wheels. - Mount the trolley simply by pushing it on the open girder without disassembling of the unit. Large adjustment range on many carriers, simply by replacing the spacer discs. - This trolley maintains secure between wheels and flange surfaces even under highly weights thanks to the carefully designed contours of the steel trolley wheels. - Both side plates are pivot mounted so that trolleys can move freely at adequate angles to the flange surface in of welded joints that might otherwise cause uneven weight distribution on the four wheels. Package list: 1 Beam Trolley