1) Often in pairs for precision producing and measurement 2) Supplied with clamps Type A model: V30, V33 Dimensions: V30: 92" x 36" x 55" x 40" x 6-30" V33: 105" x 41" x 60" x 45" x 6-33" Type B model: VB50, VB60, VB130 Dimensions: VB50: 2.5" x 2.5" x 2" x 90" x 1-3/8" VB60: 4" x 3" x 3" x 125" x 2-1/4" VB130: 6" x 5" x 4" x 211" x 4-3/8" Parallel block has many types: 1. Hardness: HRC55~62 2. Accuracy: ±0.01mm 3. Parallelism: 0.005mm PB161: 100 x 5 x 16, 100 x 6 x 18, 100 x 8 x 24, 100 x 10 x 30, 150 x 12 x 36, 150 x 14 x 48, 150 x 18 x 60, 150 x 22 x 62, 200 x 31 x 15 x 2.5 (30°), 9 x 2

Tpye A V-Block with Clamp Set