Store your fragile glass hydrometers safely with this 18-place polypropylene rack. Designed for durability, it features 25 mm diameter holes in the middle and top plates, while the bottom plate includes wells tapering from 25 mm to 9 mm to securely hold the hydrometer bulb. The stable base measures 210 x 216 mm to prevent tipping, and the rack stands 251 mm tall with convenient handles. Steam autoclavable at 121°C for easy sterilization.