Made of rubber.
Fast EASY way without costing a fortune.
It is a nice alternative to the expense of milling a bolt for a custom knob. Makes gripping and cycling the bolt easier, can do it in the web of your thumb/index, don't even need to grip it.
grace@gofairubber.com

Heat Resistant Food Grade Silicone Pot Holder Mats Pads for Spoon Rest Multipurpose Trivet Hot Dishers * MULTI FUNCTION: These trivet mats not only protect your table top, but also as a jar opener, hot pot holder, large coaster, hot mitts, spoon rest * NEW DESIGN POT HOLDERS: Honeycomb designed silicone hot pads set with great texture prevent water droplets from counter and x anti-slip, each mat with a hole for easy hanging * FLEXIBLE & DURABLE: Easy to clean and store away, very soft, great to grab as any purpose you could creative * PREMIUM SILICONE TRIVET MATS: 100% food grade silicone, high quality, BPA free, heat-resistant temperature is -104℉ to 446℉ (-40℃ to 230℃), safe for use in the oven, freezer, microwave and dishwasher

Custom Logo Colorful Wide Rubber Band Strap Flexible Rubber Silicone Cup Bottle Sleeve Cover Set Glass Heat Insulation Protective Sleeve * FIT: Designed to fit exact specifications of inner canister
* SAFE:food-grade silicone
* EASY: Makes decarbing concentrates and infusing oils even easier
* PRODUCTIVE: Infuse more oils simultaneously or use sleeve during decarb

Bike Silicon Handle Grip Sponge Rubber Handlebar Cover
* Fit most types of bikes: For bike, cruiser, dirt jumper, electric bike, folding bike, mountain bike, scooter, tricycle, wheel chair, commuter or urban bikes, your kids low-rider bike. * Bicycle grips are designed for convenient installation and come with durable caps that secure the application on the handlebar tube. * Will fit any standard straight bicycle or stunt scooter handle bar. * Help absorb vibration and give the rider more comfortable feel.Can increase the shockproof effect, avoid palm and finger paralysis. * It can make the grips tighten, prevent handlebar grips from loose-off, very easy to install.The non-slip surface enhances the rider's grip on off-road and is ergonomically designed

Anti Vibration Damping Vibration Screen Colorful Super Bouncy Soft Rubber Silicone Ball with hole hollow Made of heavy duty rubber for maximum durability and long term use Easy to clean; rinse in water and air dry Welcome you mail back to me for detail. Grace Zhao grace@gofairubber.com

Computer Rubber Air Blower Pump Dust Cleaner for Eyelash Extensions Succulent Plants Keyboard Camera * Material: Plastic,Rubber * Hard-Plastic nozzle with inlet-valve. * Natural and environmentally friendly and non-toxic. * Perfect for cleaning digital SLR, SLR, digital camera lens, binocular lens, and telescope lens, filters, musical instruments,computers, keyboards, cellphone, etc.