Silver anodized aluminum I Beam track with satin finish. 8 feet. Can be hand bent to a minimum 2 inch radius. Ceiling or Wall Mount. Accepts 4121 nylon wheel carriers or 3312 nylon block carriers. Wall mounted with 4124 or 4144 wall brackets. Ceiling mounted with 4126 ceiling bracket or 3082 snap in retainer. Tracks can be spliced end to end with 4128 ceiling splicer or 4130 wall splicer. Compatible with 4132 or 4134 end stops.