Innovative Marine Universal Lid Clips for Rimless Aquariums - 12mm Fits glass or acrylic with thickness of 12mm 4 clips per pack, color: Clear Works with Innovative Marine DIY screen kits, premade screens and your own screens or aquarium lids Depth of holding area: 5/8" Length of clip: 2" Provides a clean fishied look by holding screen or lid below / flush with the rim of the aquarium