4 Pair 8 Pc 5/32'' x 3'' Precision Thin Parallel Set Block Machinist Toolmaker 5/32" Thin Super Precision Parallel Set; Increments (Inch): 1/8 Height range (Inch): 1/2 - 7/8; Thickness (Inch): 5/32 Length (Inch): 3; Parallelism (Decimal Inch): 0.0001 Contents include: (2) 1/2'' (2) 5/8'' (2) 3/4'' (2) 7/8'' Quantity: 1 set (4 pair, total of 8 pieces)