Check the listing for details. 50 - Viking PS307 4-NM Cable Plastic Stacking Staples. Condition: New – Open box. Listed at 8.50 USD. This sale is for 50 – Viking PS 307 plastic, stacking staples. The manufacturer specifies application as “For Stacking (4) #14-2 or (4) #12-2 w/ ground Non-Metallic Cables”. These seem like a fine alternative to other stackers. The nails seem at least decent, as I can drive them into 60+ year old framing lumber without them bending. Buyer is responsible for verifying compatibility with buyer’s application. Photos are of pieces from the lot used for this sale. Please review photos carefully.