This brass extension nut will add 1 3/4 to your faucets shank for those extra thick countertops Features. Solid Brass Construction for Durability and Reliability. Provide Extra 13/8 Inlet Extension for Marble and Granite Countertop Installation. 3/8 18MPSM Connection. For Single Hole 3/8 IPS Faucet Use. Easily Installs with Adjustable Socket WrenchSpecifications. Material Brass. Collection Plumbing Parts. Type Plumbing Parts. Theme Classic. Dimension 1.25 H x 1.25 W x 1.75 L. Weight 0.13 lbs