6cm 8cm 10cm Chrome Plated steel retort ring lab support ring with bosshead clamp DIAMETER OF THE LAB SUPPORT RING: 60mm; 80mm; 100mm(two for each type) Specification: - Material: iron and plastic - Color: black - Weight:403 g/0.89lb Package list: 2 set x lab support ring clamp(3pcs each set, diameter of the lab support ring: 60mm; 80mm; 100mm(one for each type) Kindly note: Due to lighting effect, displayer 's lightness and manual measurement there could be some slight different in the color and size between the photo and the actual item. Hope you understanding! Thank you! 30cm Height Stand Retort Iron Stand With Clamp Clip Lab Ring Flask Laboratory eB MATERIAL: Iron and plastic Laboratory stand and clamp is a generally used lab instrument used for physics and chemistry experiment. - The iron stand for fixing and supporting a variety of instruments, commonly used in filtration, heating experiment HHNIULI 2 Set Lab Stand Support Retort Ring Set, Laboratory HHNIULI 2 Set Lab Stand Support Retort Ring Set 6PCS Laboratory Clamp Ring 60mm 80mm 100mm for Laboratory Classroom