150 170 Series Bulldog Jack 1/2 inch Plunger Pin Set. Ring Swivel Replacement Part. (carded) Constructed with durable weather resistant materials Easy to install 1/2 In. in diameter cotter pin Fits BULLDOG trailer jack series 150 160 170 (sold separately) Interchange  500178  457-2117  402-018400  018400 Net Weight (lbs) 0.24 Specification Brand: Bulldog Part Number: 500178 Warranty: Limited 5 Year Warranty UPC: 086693001784 Dimensions: 8.5" L x 12" W x 5" H Weight: 3.4 lbs.
