LUCID Comfort Collection Gel 4 in D Memory Foam Twin Mattress Topper Bench Top Saws A: They are 1 4 20 USS 1000088971 A: They are 1 4 20 USS coarse thread The slim snap on faceplate frames a compact quarter turn valve—minimal yet purposeful Sleep cool and comfortable with premium SureCool™ gel infused memory foam 4 inch profile adds an ultra plush layer of plush comfort to your mattress without sacrificing support Open cell memory foam allows air to pass through the memory foam to help you sleep cooler Our premium memory foam can help relieve common pressure points and improve the feel of the mattress Shipped compressed and rolled for easy shipping and transportation We only us CertiPUR US certified memory foam to ensure lasting comfort and safety Comes with a 3 year warranty Twin: 38 inches wide x 74 inches long Bedding Size Twin Actual Width (Inches) 39 Actual Length (Inches) 75 Actual Depth (Inches) 4 Material Memory foam Thread Count 0 Liquid Protection No Care Instructions Hand washable Fits Mattress Height (Inches) 24 Full Mattress Encasement No Closure Type N A Bed Bug Protection No Hypoallergenic No Cover Type Mattress cover Warranty 3 year Color Finish Family Blue Lining No lining Fill Material Memory foam Type Mattress topper Textile Information Imported CA Residents: Prop 65 Warning(s) No UNSPSC 52121500 Cooling Yes Collection Name Gel Thickness (Inches) 4 Waterproof No