Metric Nitrile Rubber NBR O Ring Seals 1.9mm Cross Section 5mm - 140mm OD Black | eBay
5mm ID x 1.5mm C/S Viton O Ring. 5x1.5. Choose Quantity. New. Metric. | eBay
Amazon.com : Visionis FPC-5327 One Door Access Control in Swinging Door 600lbs Maglock + VIS-3002 Indoor Use Only Keypad / Reader Standalone with Mini Controller + Wiegand 26, No Software, EM Card, 1000 Users Kit : Electronics