Absolute Seating Table Bases Glides for Restaurants & Homes, Adjustable Glide, Thread: #1/4-20 x 1/2" H, 12 pcs per Package Adjustable Screw On Glides for Table Bases in Restaurants & Homes Black Plastic Base with Raised Dots: 1-1/8"R x 3/8"H Zinc Plated Thread: #1/4-20 x 1/2"H Glide for Standard Bases with #1/4-20 Thread Glide for Standard Bases with #1/4-20 Thread