Three adjustable drop lengths (6 to 11 in. 12 to 18 in. 18 to 24 in). Ideal for projectors weighing up to 50 lbs.. Built-in roll pitch and yaw adjustments make alignment fast and easy. Quick release mechanism allows projector to be easily removed for service. Compatible with all 1.5 NPT threaded pipe.Features 1 in. incremental drop length adjustment Completely pre-assembled mounting interface for quick installation Fully adjustable roll pitch and yaw Quick release mechanism allows for easy service of projector Through-column cable routing for an uncluttered look Pre-sorted hardware pack for easy installationSpecifications Weight capacity - 50 lbs. (23kg) Max mounting pattern - 14.9 (380mm) diameter Roll (side to side) - +/- 6° Pitch - (up/down)+/- 25° Rotation (yaw) - 360° Drop length - 6 - 11 in. 12 to 18 in. 18 to24 in Height adjustment - 1 in. increments 1.5 in. NPT thread compatible - Yes Mounting surface - wood joist structural wood or structural concrete (accessory required HE4) Joist spacing - single joist Construction - aluminum/high-grade cold rolled steel Product finish - scratch resistant epoxy powder coat Item Weight - 7.5 lbs. (3.4 kg) JKR-18 A Dimension - 15.4 L x 8.9 Wx 6.3 H in. Color - Black - SKU: CMSN117