Tweco® Model 23-40-15 15' Liner by CM Industries CM Industries Sale! from 2510 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Tweco Style .023" X 15' Liner For Use With Tweco Mini-MIG-Gun MIG Guns SKU:CMI 23-40-15