finish: black / zinc size: 8" to 36" inch ball: 2, 4, and 5 ball bearing load: 50 kg. -made from tata sheet -european anti rust coating -german design and technology -72 hrs. salt spray tested for zinc -1000 hrs. salt spray tested for black -100000cycle tested -extra smooth ball bearings. -extra heavy and full extension. -nylon locking system -made in india. till now we have furnished all details of our indigenous telescopic channel (drawer slider). now through a general comparison, you see we have got an edge over other similar products available in the market.