The Dew/Luji Glass Cup by Bioloark is their smallest terraria. It is engineered to recirculate water for optimal visibility of your scape. Equipped with ventilation holes this all-glass distraction-free design will make your design stand out. Compatible with DX series Bottle Lamp Stands. Model MY-120 MY-120H MY-150 MY-150H Dimensions (W x H) ~ 4.75in x 4.75in (120mm x 120mm) ~ 4.75in x 7in (120mm x 175mm) ~ 6in x 6in (150mm x 150mm) ~ 6in x 9.25in (150mm x 235mm) Volume ~ 0.25 gallon (1 liters) ~ 0.5 gallon (1.9 liters) ~ 0.5 gallon (2 liters) ~ 1 gallon (4.1 liters) Unit Weight ~ 0.7lbs (300 grams) ~ 1.1lbs (500 grams) ~ 1.2lbs (550 grams) ~ 1.5lbs (700 grams) Material Borosilicate glass Borosilicate glass Borosilicate glass Borosilicate glass Glass Thickness 3mm 3mm 3mm 3mm