In just a few short weeks our STS-187 has become one of our new best sellers! We have been constantly asked when a 1/4" version will be available, well here it is! The NEW STS-250 , Shaft Tube Seal for 1/4" flex Shafts and 11/32" OD stuffing box tubes, is sure to be a common standard while outfitting a new hull or improving an old one. This not only prevents most water from entering the tube but also alleviates the troublesome, time consuming practice of taking out your shaft to oil/grease it. We all know how precious time is when your "on the clock" and fiddling around with taking the shaft in and out not only wastes this time but also puts stress on your collet insert from opening and closing. Just hook up a hose to the fitting and spray your favorite oil in. So whether your an avid racer or sport boater, put this on your list of "MUST HAVES".