Eisco Labs Economy Test Tube Rack, Holds 6 15mm Test Tubes - Unfinished Hardwood

6-Place 18mm Plastic Test Tube Rack, White (Single)

Plastic Test Tube Rack, 12 Holes x 20mm Diameter, White (Single)

Eisco Labs Test Tube Rack - Holds 12 Tubes, 18mm Test Tubes - Polypropylene

Eisco 12 Hole Test Tube Rack, Holds (6) 30mm and (6) 15mm Diameter Test Tubes

Eisco Labs Wooden Test Tube Rack, 12 Tube Capacity, 7/8" (22mm) Holes

Eisco Labs Economy Test Tube Rack, Holds 6 22mm Tubes - Unfinished Hardwood

Bamboo glass test tube holder clamp rack tongs 7" New