Tajima CNV-100SP26 - 26:1 Ratio Premium Caulk Gun, Model: CNV-100SP26, Tools & Hardware store 1/10 gallon gun with an extra-long 10-1/2 inch barrel Premium-grade 26:1 extra-high thrust caulk guns Enhanced SST thrust system for dependable, non-slip performance Extra-long barrels for fast and hassle-free tube reloads Extra-long seal puncture pins to for the new extra-long tube nozzles