$ 16.55 Category: Martindale CP501 Check Plug Related products Martindale CP501 Check Plug$ 16.55Select options This product has multiple variants. The options may be chosen on the product page Martindale CP301 110V Industrial Socket Tester 16amp$ 67.86Select options This product has multiple variants. The options may be chosen on the product page Martindale PC105 3 Phase Industrial Socket Testers 32A – 400v 415v 32amp 5 Pin with Phase Rotation (PC150/32)$ 93.73Select options This product has multiple variants. The options may be chosen on the product page