Amazon.com: M-Parts 4PC Trailer Hub Dust Caps with Rubber Lubbed Cap, 2.75" OD x 1.5" Height, for 8-Lug 7,000/8,000LB Trailer Axle Wheel Hub, Rubber Grease Dust Cap for Wheel Beaing Hub DC-275L (
Amazon.com: Trailer Bearing Dust Cap 4 Pieces Trailer Axle Grease Cap Wheel Center Caps Lube Grease Covers with 4 Rubber Plugs Replacements for Trailer Wheel Hubs(1.98 Inches for 2,000 to 3,500 lb) : Automotive
Axle Grease Cap 2-3/4" OD - Inland RV
Dust Grease Cap Cover 2.72" Trailer Hubs - The Trailer Shoppe
Dexter Wheel Bearing Dust Cap - 085-001-00 | highskyrvparts.com
Trailer Hub Grease Cap, Drive-In, | Waterbury True Value
Carry-On Trailer 2 in. EZ Lube Dust Cap, 2,990 lb. at Tractor Supply Co.