Following is the specification of my product (shoring props): outer tube: 56*1.7/1.8/2.0/2.5mm, inner tube:48*1.7/1.8/2.0/2.5mm, length: 1800-2800mm, 2000-3200mm, 2200-3400mm, 2400-3800mm, 2600-4000mm, 3200-4400mm. Material: Q235 Surface treatment: painting, spraying, zinc coated etc. Note: We can produce the shoring props according to your request or drawing