Oval Bathroom Sink Basin Trim Overflow Cover GlobMarble supplies all necessary components for setting up lavatory bowl drain systems and overflow systems (shown in the following diagram). We also supply a number of installation aids - such as bowl clips and others that are set into the matrix during casting to provide an integral bowl mounting system. These components are used to manufacture cultured marble or solid surface vanity bowls. Inside dimensions 3/8 x 1 1/4" approximately Outside dimensions 5/8 x 1 5/8" approximately Overflow hole connector designed to create an overflow hole at the vanity bowl casting, and are removed after casting. The overflow hole connector designed to fit Overflow Tube and Oval Overflow Hole Cover. It is easily removed for reuse and eliminates costly refinishing of the overflow hole. Oval overflow hole connector GlobMarble supplies all necessary components for setting up lavatory bowl drain systems and overflow systems (shown in the following diagram). We also supply a number of installation aids - such as bowl clips and others that are set into the matrix during casting to provide an integral bowl mounting system. These components are used to manufacture cultured marble or solid surface vanity bowls. Oval Overflow Poly Cup Trimmed Use with our overflow PolyDome ,oval overflow tube, and oval PolyCup stem assembly. The new slim style improves resistance to thermal shock, makes casting application easier, and speeds production. Captive Nut Assembly Bolt Only for Captive Nut Assembly (Ea) - #011311 Jam Nut Only for Captive Nut Assembly (Ea) - #0113212 5/16" Flat Washer Only for Captive Nut Assembly (Ea) - #0113213 Lock Washer Only for Captive Nut Assembly (Ea) - #0113214