Sai Workshop 4.25 in ID Opening Drop Ceiling & Panel Pass-Through Grommet, Dual-Sided Threaded, Fits 0.5–0.8 in Panels, 4.75 in Cutouts, White 2-Pack | 3D Printed in USA

Sai Workshop 4.25 in ID Opening Drop Ceiling & Panel Pass-Through Grommet, Dual-Sided Threaded, Fits 0.5–0.8 in Panels, 4.75 in Cutouts, White 2-Pack | 3D Printed in USA

• 4.25 IN ID OPENING FOR 4 IN DUCT PASS-THROUGH – Tested with nominal 4-inch flexible duct and suitable for 4-inch rigid duct or pipe applications. The larger clear opening provides useful installation clearance for routing ducting through drop ceiling tiles and panels while covering the rough cut edge for a cleaner finished look.
• DUAL-SIDED THREADED HOLD – Unlike ordinary press-in grommets, the two-piece threaded design tightens from both sides of the panel for a more secure fit. Helps prevent the grommet from shifting, popping out, or falling through, especially on vertical panels and ceiling tile installations.
• FITS 0.5–0.8 IN PANELS – Designed for panel thicknesses approximately 12–20 mm (0.47–0.79 in), including drop ceiling tiles, plywood, MDF, cabinet panels, and electrical or low-voltage panels. Measure panel thickness before ordering for the best fit.
• TEXTURED GRIP + INNER RELIEF GROOVE – The textured outer flange provides extra grip for easier hand-tightening, while the recessed inner groove helps clear rough or slightly uneven cutout edges so the grommet can sit more neatly against the panel.
• DURABLE PETG, 3D PRINTED IN USA – Made from tough PETG with better heat tolerance than standard PLA commonly used in 3D printing. Designed for long-term panel and ceiling installations; fine layer lines and subtle surface texture are normal characteristics of the 3D-printing process and do not affect function.