6 The bearing trolley assembly is made of iron for impact resistance and noiseless during use, bearings and pins welded firmly, stable work, strength and quality! Super carrying capacity. Maximum carrying capacity: 2769LBS/1256KG Can be used with Strut Channel, you can set 2 directions of motion to make the hoist work in different positions. The distance between the center of the bottom hole can meet the location requirements of different types of electric hoist installation holes. Bolts securing the support channel need to be installed outside the track Colour:silver Material:iron Size: 14 x 8.9 x 10cm Package Contents: 1 x hanging pulley Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.