test tube racks 

4-Way Flipper 4 Racks/Tray - SSI-5400-29

15mL Tube Wire Rack 15 Place - HS23215

1-well 50ml tube rack - HS23052

1-well 50ml tube rack (1) - HS23051

1-Well 50ml Tube Rack Polystyrene, pack of 5 - HS23053A

50 place peg rack - HS24311B

50mL Tube Wire Rack 8 place each - HS232461

Epoxy Coated Wire Tube Racks 16mm

Eppendorf Tube Rack, 12 positions

Fold and Snap Test Tube Rack

Freezer box C/B 50ml 16 hole - CP3693-27-328

Freezer box cardboard 15ml 36 hole - CP3694-27-330

Full size rack, 13 mm, 72 wells, green - HS27511C

Fullsize Tube Rack 16 mm, 72 wells 8/pk white - HS27552A

Half size Delrin rack

Mega Rack 10-13mm 216 Tubes - HS24322E