For Dewalt N233943 N386480 Nailer Springs, Nailer Springs are nickel-plated for optimal compressed expansion. Nailer Springs Dimensions：0.02 inch wire diameter, 0.3-inch outside diameter, 13.78 inch length. Replacing the DCN6901 Nailer Spring is so easy; it takes only 5 minutes to fix your nailer, and it's a quick fix for Dewalt nailers that don't feed or drive nails. N233943 N386480 Nailer Springs Compatibility with: DCN21PLB, DCN21PLM1, DCN693B, DCN693M1, DCN690B, DCN692M1, CMCN621PLB, DCN692B, BCF28WWB, BCF30PTM1,BCF28WWM1, BCF30PTB. For any after-sales problems, you can always consult us; we will be the first time to reply to you.