187 Killer Pro Derby Knee Pads – Black – Medium Review SpringBuster Protective Gear April 8, 2018July 13, 2018187 Killer Pads, Inline & Roller Skating, Outdoor Recreation, Skateboards & Scooters, Skates, Sports & Outdoors 0 Comment This fits your . Make sure this fits by entering your model number. 187 PRO DERBY KNEE PADS M-BLK BLK 187 Pro Derby Knee Pads Medium Black Black Skate Pads