Plastic Test Tube Rack for 15/18 mm Tubes, Hole Diameter is 18.7mm, Holds 50, Detachable, Karter Scientific 208U7 (Pack of 10) 15/18mm Pack of 10 hidden you can easy to adjust

you can easy to adjust difference lengths and style through hooks & rings depending on your intended level of comfort

back strains

Red/black N/S lines in capsule ensure easy and safe settling

Comfortable and wide contact area provide stable support for easier transfer

3/32" shaft

Plastic Test Tube Rack for 15/18 mm Tubes, Hole Diameter is 18.7mm, Holds 50, Detachable, Karter Scientific 208U7 (Pack of 10) 15/18mm Pack of 10 hidden you can easy to adjustPlastic Test Tube Rack for 15 18 mm Tubes, Hole Diameter is 18. 7mm, Holds 50, Detachable, Karter Scientific 208U7 (Pack of 10) 50 Place Test tube rack for 15 18mm diam. Tubes, detachable, plastic, Color is CLEAR. Test tube rack is manufactured to hold 50 tubes having an outside diameter ranging from 15 18mm. Great to hold tubes for parties, lip balm kits, essential oil preparation, etc. Product Features 50 hole,Diameter: 18. 7mm 0. 74" These are