SELKIRK Corp 244086 4x12 Pellet Stove Pipe Product Description 4" x 12", 4VP-WZAJ12, Adjustable Pellet Stove Pipe. Type L vent gives installer the ability to add from 2-1/2" length to a maximum of 10-1/2" when slid over another piece of type L pellet pipe. Made from 304 stainless steel with a welded seam inner wall, combined with a galvalume, welded seam, outer wall for wood pellet, corn, oil fuel and biofuel burning appliances. Listed at 1" clearance to combustibles. Features fully unitized twist-lock construction in 3" and 4" diameters. From the Manufacturer 4" x 12", 4VP-WZAJ12, Adjustable Pellet Stove Pipe. Type L vent gives installer the ability to add from 2-1/2" length to a maximum of 10-1/2" when slid over another piece of type L pellet pipe. Made from 304 stainless steel with a welded seam inner wall, combined with a galvalume, welded seam, outer wall for wood pellet, corn, oil fuel, and biofuel burning appliances. Listed at 1" clearance to combustibles. Features fully unitized twist-lock construction in 3" and 4" diameters. Features 4" x 12", 4VP-WZAJ12, Adjustable Pellet Stove Pipe Type L vent gives installer the ability to add from 2-1/2" length to a maximum of 10-1/2" when slid over another piece of type L pellet pipe Made from 304 stainless steel Listed at 1" clearance to combustibles Features fully unitized twist-lock construction in 3" and 4" diameters USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.