8 Pair 1/2'' Steel Parallel Set 6'' Long 0.0002'' Sqaure Precision 7/8in - 1-3/4 8 Pair 1/2'' x 6'' parallel set; Easier Handling because there are 2 holes in each one +/- .0002" in Parallelism; Paired +/- .0002" in Height; Storage case INCLUDED; All the size are 6" Long and 1/2" Wide or Thick; 1/8" Incrementation of height from 7/8" to 1-3/4" Each Set contains 1 Pair of the height listed: 7/8, 1, 1-1/8, 1-1/4, 1-3/8, 1-1/2, 1-5/8, 1-3/4" Quantity: 1 set (8 pair, total of 16 pieces); Case overall dimension: 7-1/2''L x 9-3/4''W x 3''H