Oumefar 10Pcs 693ZZ Deep Groove Ball Bearing Miniature Double Rubber Sealed Bearings Durable Multi Use black Small for 3D Printer Wheel Roller Skates 3 * 8 4mm

【High Quality Material】Our longboard bearings are made of high quality bearing steel materials ,which are strong enough for long term use 【Rubber Seal Bearings 】The skateboard bearing with double sided rubber sealing ring can prevent the intrusion of water and dust or any other objects . 【Wide Application】Our ball bearings Fit for many fields :industrial machines ,cars ,ships ,household appliances ,health care system ,skateboards ,inline skates ,roller skates ,scooters ,and other skating applications ,also available for 3D printer wheel bearings 【High Temperature Resistance Bearing】The industrial bearings able to operate at a temperature range of20 200℃ or so 【Specification】Inner Dia : 3mm / 0 . 12inch; Outer Dia :8mm / 0 . 31inch; Thickness : 4mm / 0 . 15inch