Function: 1 This is an essential multi-functional retention device for the school physical chemical laboratory. 2. The product can be assembled on a variety of laboratory brackets, including vertical, parallel, tilt, clamp, fixing, etc. 3 Brackets can meet the basic lab requirements. 4 Cross clamp clamps can be clamped horizontally. Flask clamp opening is over 35mm 5 This product has high quality, excellent performance, and long service life. Specifications: Item Type: Multifunction Experiment Bracket Model: 03003 Size: Approx. 28 x 14.5 x 61cm / 11 x 5.7 x 24in Package List: 1 x Marble Base 1 x beaker clamp 1 x crank 1 x large iron ring 1 x small iron ring 2 x upright rod 1 x horizontal rod 1 x drop clamp 4 x cross clamp 1 x flask universal clip