Dell PowerConnect 6X177 Equivalent 1U Rack Mount Kit (Older Model) IMPORTANT: We have replaced this model with a newer one. Search for "B01C1WA9H8" to find the newer model in stock at Amazon. Compatible with Dell PowerConnect 2748, 2848, 3048, 3424, 3448, 3524, 3548, 5324, 5424, 5448. Not for use with Dell PowerConnect 3424P, 3448P, 3524P, 3548P, 5524P, or 5548P (see part WJ690 instead). Made of high strength carbon steel with a black oxide protective coating. Custom manufactured to meet the original product strength and color.