The plastic fitting stems are designed to help with insertion and removal of the ear tips, even if wearing gloves, helping ear tips stay clean longer. The ultra-soft conical shaped ear tip with raised ribs that look like screw threads and the fitting stem in the shape of a Phillips head screw provide an overall look that might appeal to some users to help with compliance. The large cone shaped ear tip is designed to help fit a variety of ear canal shapes and sizes. This product is EARfit testable to help validate the level of protection the individual user is getting.
3M 92952, E-A-R Skull Screws Earplugs P1301, Corded, 480 Pair/Case, 7000127181
$448.60
Factory Stock, 7-10 Day Leadtime
3M E-A-R Skull Screws Earplugs bring rugged style as well as noise reduction. Even though they look like threaded metal, these ear tips are made with ultra soft foam to help comfortably protect the wearer. The large foam ear tips of these push-to-fit earplugs are inserted into the ear canal with a simple push of the firm plastic fitting stems.

3M 87449 Silver Depressed Center Grinding Wheel, T27 Quick Change, 9 in x 1/4 in x 5/8-11 Center Hub Thread, 7010409732, 20 per case
Dynabrade 97570 1/2" NPT Female Safety Coupler
3M™ 72010, Replacement Filter Kit 523-01-29, 7000056891, 1 EA/Case
3M™ 72016, Remote Alarm & Strobe 529-05-20, Audible, 7000131708, 1 EA/Case
Dynabrade 98263 3/8" NPT Male Plug
Dynabrade 98265 3/8" Female Coupler with 3/8" Male Plug Assembly
Dynabrade 95676 1/4" Female Coupler with 1/4" Male Plug Assembly
Dynabrade 95745 1/4" NPT Speed Regulator
Dynabrade 94991 1/4" Female Composite-Style Coupler with 1/4" Female Plug Assembly
3M™ 72787, Calibration Kit 529-04-48, Large, 7000052154, 1 EA/Case
Dynabrade 95746 3/8" NPT Speed Regulator
Dynabrade 94990 1/4" Female Composite-Style Coupler with 1/4" Male Plug Assembly
Dynabrade 97567 1/4" Safety Coupler, Male
3M™ 72122, Portable Compressed Air Filter and Regulator Panel 256-02-01, 100 cfm, 8 outlets, with Carbon Monoxide Monitor, 7000052147, 1 EA/Case
3M 11414, Roloc Disc 361F, P120 XF-weight, TR, 1 in, Die R100N, 7000045104
3M 21543, Scotch-Brite Roloc Clean and Strip XT Pro Extra Cut Disc, TR, 2 in x NH, A XCS, 7100179815, 60/box
3M 26432, PPS Series 2.0 Sealing Plug, 96 plugs per pack, 7100135627
Dynabrade 95677 1/4" Male Plug with 1/4" NPT Female Thread
Dynabrade 95674 1/4" Female Coupler
Dynabrade 94992 1/4" Male Composite-Style Coupler with 1/4" Male Plug Assembly
Dynabrade 97566 1/4" Safety Coupler, Female
3M 77197, Scotch-Brite™ Roloc™ Deburr and Finish PRO Unitized Wheel,TR, 3 in x 1/8 in x NH, 8C CRS+, 7100109130, 40/box
Dynabrade 95684 1/4" Male Coupler
Dynabrade 98271 1/2" NPT Male Plug
3M™ 72013, Adapter 529-04-50, 110-120 VAC, 7000131705, 1 EA/Case
Dynabrade 97568 3/8" NPT Female Safety Coupler
3M 71361, 641WY 1/4" X 24", 1200 Mesh Diamond Cloth Belt, 7010534916
Dynabrade 97571 1/2" NPT Male Safety Coupler 
