This product is a Hydrometer, which is made of durable glass material, with good texture, sturdy and practical. Easy to install and use, it can be easily applied to your motorcycle, a very practical accessory that will meet your needs well. Features -Color:Transparent -Material:Wood, glass, plastic -Size:19.50X1.50X1.50cm/7.66X0.59X0.59in -Size:25.00X6.50X6.00cm/9.82X2.55X2.36in -Size:30.00X12.50X6.50cm/11.79X4.91X2.55in -Measuring cylinder capacity: 100ml -The Aquarium Hydrometer is designed to meet the needs of marine aquaculture. -Whether you are a professional fish farmer or a hobbyist with a fish tank at home, this meter will help you maintain optimal water conditions. -Its precise measurement capabilities allow you to accurately monitor the , density, and saltiness of the water. -Its firm glass materials ensure durability and resistance to damage, providing performance. -Great craftsmanship, delicate shape, good texture, beautiful look, fashionable and unique. Package list: 4 x meter 4 x measuring cylinder 4 x wooden box