Description: Semicircular shape Lightweight and easy to carry Constructed from nylon material, strong and durable Can be installed securely and easily on the kayak to fix fishing rod holder Great accessories for the kayaks, boats, canoes, sailboats, and ATVs Stainless steel installation hardware included Specification: Material: Nylon Color: Black Size: approx. 4.4 x 4.8 x 6.2 cm / 1.72 x 1.86 x 2.44 inch Hole diameter: approx. 2 cm / 0.79 inch Screw size: M6*30 Package Includes: 2 Pieces Rod Holder Mount Bases 4 Pieces Screws Note: Please allow 1-2cm errors due to manual measurement. Color maybe slightly different since different monitor. Thanks!