Descriptions:* Construction is durable and chemical resistant.* Versatile design accommodates different tube sizes on each side.* Each Size: 17cm x 9cm x 5cm* The four sides hold the following tubes:Four – 50ml tubes(Well Dia: 29mm).Twelve – 10ml or 15ml tubes(Well Dia: 17mm).Thirty Two – 1.5ml or 1.8ml tubes(Well Dia: 11.5mm).Thirty Two – 0.5ml tubes(Well Dia: 8mm). Package Content:1 Pc x Tube Rack.