Specification Brand : flexman BulletPoint1 : Designed for 19mm Tubes: This test tube rack is designed with 12 holes in total, and each hole is about 19mm / 0.75in in diameter. BulletPoint2 : 304 Stainless Steel: This centrifuge tube holder is made of premium 304 stainless steel material, and it's featured with sturdy structure and excellent impact resistance. BulletPoint3 : 3 Tiers: This test tube holder features 3 tiers design which can hold the tube firmly and avoid the test tube damage effectively, suitable for laboratory. BulletPoint4 : Wide Application: This centrifuge tube rack is widely applicable to scientific experiments, plant propagation and storage of cooking spices. BulletPoint5 : Easy to Use: This stainless steel tube rack is ideal for laboratory, which can provide clear view of the tube contents and convenient insertion and removal of tubes. ItemName : FLEXMAN Scientific Test Tube Rack, 3 Tiers 12 Holes Stainless Steel Centrifuge Tube Holder for Scientific Experiments, Plant Propagation., Designed for 19mm Tubes ItemPackageDimensions_Height : 7 centimeters ItemPackageDimensions_Length : 16 centimeters ItemPackageDimensions_Width : 9 centimeters ItemTypeKeyword : science-lab-tube-racks Manufacturer : flexman ModelNumber : flexmano7svuh64fi NumberOfItems : 1 PartNumber : flexmano7svuh64fi ProductDescription : Specification Item Type: Metal Test Tube Rack Material: 304 Stainless Steel Application: Convenient Insertion and Removal of Tubes in Laboratory Product Size: Approx. 15.9 x 8.5 x 6.2cm / 6.3 x 3.3 x 2.4in ( Manual Measurement, Slight Error May Exist )