This steel Fireproof unit is used on the majority of stage installations with medium to light weight curtains on lengths up to about 36'. On heavier installations, Models 171N or 171R can be used. These tracks are identical to Model 170 except with nylon or neoprene ball bearing carriers are supplied. #170 cwana Complete with all necessary accessories. Specify center draw or one way draw. Priced by the foot. Track supplied in 20 foot sections. Splicing clamps will be provided according to size of track. Specify ceiling mount or hanging clamps. 14 gauge galvanized steel. (1700-A supplied in 12 gauge aluminum for light weight use only.) Obtainable in unspliced lengths up to 26'. Holes can be drilled for direct ceiling attachment. Approximately: 1-3/4" wide x 2" high.