Selkirk 4 in. D Galvanized Steel Wall Thimble

The Metalbest RV 4 in wall thimble is designed for safe and efficient installation of Type B gas vent pipe through combustible walls, making it ideal for residential, commercial, and industrial applications. This 4 in wall thimble maintains proper clearance to combustibles and serves as a fire stop, with an adjustable design that fits wall thicknesses from 4.125 in to 7 in. The RV series features a snap-together, non-positional lock system and die-formed ends, eliminating the need for cutting or special engineering during installation. The improved joint design allows for a rapid and secure connection, while the lock tab feature gives installers the option to engage the tab instead of using sheet metal screws, as required by local code. Made from durable galvanized steel and aluminum, this vent pipe thimble is UL listed and built to withstand temperatures up to 550°F. Choose the Metalbest RV 4 in wall thimble for reliable venting performance and easy installation in your next project.

• PRODUCT IDENTIFICATION: Metalbest model 187704 general 4 in — sourced direct from the manufacturer or authorized distributor. Designed for standard US residential install conditions across remodel, new-construction, and individual fixture replacement work.
• GENERAL INSTALLATION: Designed for standard US residential use — applied or installed per the manufacturer's directions on the labeled surfaces or substrates. Built to meet common US residential install specs across new-construction and replacement work.
• 4 IN SIZE: Sized at 4 in — the standard residential spec for the intended application. Designed for standard US residential install conditions across remodel, new-construction, and individual fixture replacement work.
• METALBEST BRAND: Part of the Metalbest residential product line — backed by manufacturer support and warranty terms as specified by the brand. Sourced direct from the manufacturer or authorized distributor. Designed for standard US residential install conditions across remodel, new-construction, and individual fixture replacement work.
• RESIDENTIAL & COMMERCIAL USE: Designed for standard US residential and light-commercial install conditions across new-construction, full remodel, and individual unit replacement work. Pairs with matching same-brand accessory items where applicable.