This "Hook Only" material is half of the 3M Dual Lock system, but we offer it separately as well. It is best used with the 3M Dual Lock Type 170 Material (Part No. 5260-001, sold separately or together as Part No. 5260-051). Type 400 can also be mated to itself if at least one surface is flexible to allow the hooks to release. Available in black only, 1 inch wide with a very strong adhesive backing. Sold by the running foot.